evidence-evaluation

Evidence Validity Assessment

Overview Table

Item	Content
Capability Name	Evidence Validity Assessment
Capability Number	12
Core Function	Assess the authenticity, legality, relevance, and probative force of evidence
Applicable Fields	Civil litigation, criminal litigation, administrative litigation, arbitration proceedings
Key Legal Sources	Provisions on evidence in the Civil Procedure Law, Criminal Procedure Law, Administrative Litigation Law and their respective judicial interpretations; the Provisions of the Supreme People's Court on Several Issues Concerning Evidence in Civil Procedure (2019 Amendment); the evidence chapter of the Interpretation of the Supreme People's Court on the Application of the Criminal Procedure Law of the People's Republic of China; the Provisions of the Supreme People's Court on Several Issues Concerning Evidence in Administrative Litigation
Deliverables	Evidence Validity Assessment Report (including item-by-item assessment conclusions, comprehensive probative force determination, and corroboration suggestions)
Risk Level	High (evidence assessment directly affects the determination of case facts and the adjudication result)

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Legal Statement

Important Notice: The evidence validity assessment provided by this skill is auxiliary legal analysis and does not constitute formal legal advice. Whether evidence is ultimately admitted is adjudicated by the court in accordance with law. Users should note:

1. Evidence assessment is highly dependent on the specific case facts and the review of the original evidence/original objects, and AI cannot directly perceive physical evidence
2. Determining the authenticity of evidence often requires procedures such as courtroom cross-examination and expert appraisal, and AI assessment is only preliminary analysis
3. There are significant differences in the evidence rules and standards of proof among different types of litigation (civil/criminal/administrative)
4. It is recommended that AI assessment results be reviewed by practicing lawyers or legal professionals before use

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I. Core Conceptual System

1.1 Framework of the "Three Attributes" of Evidence

证据效力评估
├── 证据能力（可采性）
│   ├── 真实性（Authenticity）
│   │   ├── 形式真实性：证据载体本身是否真实、未被篡改
│   │   └── 内容真实性：证据所反映的内容是否与客观事实相符
│   ├── 合法性（Legality）
│   │   ├── 主体合法：取证主体是否适格
│   │   ├── 形式合法：证据形式是否符合法定要求
│   │   ├── 程序合法：取证程序是否合法
│   │   └── 内容合法：证据内容不违反法律禁止性规定
│   └── 关联性（Relevance）
│       ├── 直接关联：证据与待证事实之间存在直接证明关系
│       └── 间接关联：证据与待证事实之间存在间接推理关系
└── 证明力（Probative Value）
    ├── 单一证据证明力：单个证据对待证事实的证明程度
    ├── 证据间印证关系：多个证据之间的相互印证或矛盾
    └── 证据链完整性：全案证据能否形成完整的证明链条

1.2 Types of Evidence and Statutory Forms

Type of Litigation	Statutory Types of Evidence	Legal Basis
Civil Litigation	Statements of parties, documentary evidence, physical evidence, audio-visual materials, electronic data, witness testimony, expert opinions, inspection transcripts	Article 66 of the Civil Procedure Law
Criminal Litigation	Physical evidence, documentary evidence, witness testimony, statements of victims, confessions and exculpatory statements of criminal suspects/defendants, expert opinions, transcripts of inspection/ examination/ identification/ investigative experiments, audio-visual materials/electronic data	Article 50 of the Criminal Procedure Law
Administrative Litigation	Documentary evidence, physical evidence, audio-visual materials, electronic data, witness testimony, statements of parties, expert opinions, inspection transcripts/on-site transcripts	Article 33 of the Administrative Litigation Law

1.3 System of Standards of Proof

Standard of Proof	Applicable Scenarios	Specific Requirements
Beyond reasonable doubt	Conviction in criminal cases (burden of proof on the prosecution)	Evidence is reliable and sufficient; beyond a reasonable doubt; all evidence on which the verdict is based has been verified as true through statutory procedures; the evidence in the entire case forms a complete system of proof
High probability	General facts in civil cases	The probative force of the evidence provided by one party is clearly greater than that of the other party, and the judge is internally convinced that the possibility that the fact to be proved exists is greater than the possibility that it does not exist (usually understood as 75% or more)
Higher standard of proof	Fraud, coercion, malicious collusion, oral wills, gifts, etc. in civil cases	Higher than high probability; requires less than beyond a reasonable doubt but clearly higher than the general civil standard
Preponderance of evidence	Procedural facts, etc. in civil cases	It is sufficient if the probative force is relatively greater
Clear advantage	Administrative litigation (burden of proof on the administrative organ)	Evidence of the legality of an administrative act should meet the clear advantage standard

1.4 Allocation of the burden of proof

Type of litigation	General rule	Special rule
Civil litigation	"Whoever asserts must prove" (Article 67 of the Civil Procedure Law)	Reversal of the burden of proof (such as medical damage, environmental pollution, product liability, etc.); legal presumption
Criminal litigation	In public prosecution cases, the public prosecution organ bears the burden of proof	Transfer of the burden of proof for special crimes such as the crime of huge amounts of property with unidentified sources; the defendant bears part of the burden of rebuttal
Administrative litigation	The defendant (administrative organ) bears the burden of proof for the legality of the administrative act	The plaintiff bears the burden of proof for the conditions for filing suit, compensation for losses, etc.

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II. Complete workflow

Stage 1: Collection and classification of evidence information

Step 1: Identify basic evidence information

For each piece of evidence material, extract the following information:

- 证据编号/名称
- 证据种类（书证/物证/电子数据/证人证言/鉴定意见等）
- 证据来源（由谁提供、如何获取）
- 证据形式（原件/复印件/副本/复制品）
- 提交时间
- 拟证明的事实（举证目的）
- 所属诉讼类型（民事/刑事/行政）

Step 2: Determine the facts to be proved

- 列出案件中的全部待证事实
- 将每项待证事实与对应的证据进行映射
- 标注每项待证事实的举证责任归属
- 确定适用的证明标准

Step 3: Classify and organize the evidence

按以下维度分类：
├── 按证据种类分类
├── 按待证事实分类
├── 按提交方分类（原告/被告/第三人/法院调取）
└── 按证据性质分类（直接证据/间接证据；原始证据/传来证据；本证/反证）

Stage 2: Item-by-item review of the "three attributes" of evidence

Step 4: Review of authenticity

审查要点清单：
□ 书证是否为原件？复印件是否与原件核对一致？
□ 物证是否为原物？是否存在损坏、变质、污染？
□ 电子数据是否有完整的生成、存储、传输记录？是否经过公证或区块链存证？
□ 证人证言的来源是否为证人亲身感知？是否存在传闻？
□ 鉴定意见的检材是否真实、完整？
□ 视听资料是否为原始载体？是否存在剪辑、拼接痕迹？
□ 证据内容是否存在内在矛盾？
□ 证据与其他已知事实是否存在矛盾？
□ 是否有相反证据证明该证据不真实？
□ 证据形成时间与案件时间线是否吻合？

Step 5: Review of legality

审查要点清单：
□ 取证主体是否适格？
  - 民事：当事人、代理人、公证机关等
  - 刑事：侦查机关及其工作人员（是否符合回避规定）
  - 行政：行政机关在作出行政行为时已收集（事后取证原则上不可）
□ 取证程序是否合法？
  - 是否存在刑讯逼供、暴力、威胁等非法手段？
  - 搜查、扣押是否有合法手续？
  - 技术侦查措施是否经过批准？
  - 是否侵犯他人合法权益（如非法窃听、偷拍）？
□ 证据形式是否合法？
  - 书证是否符合法定形式要求？
  - 鉴定意见是否由具有资质的鉴定机构和鉴定人作出？
  - 证人是否具有作证能力？
  - 勘验笔录是否有见证人签名？
□ 是否属于应当排除的非法证据？
  - 刑事：以刑讯逼供等非法方法收集的供述（绝对排除）
  - 刑事：以暴力、威胁等非法方法收集的证人证言、被害人陈述（绝对排除）
  - 刑事：收集物证、书证不符合法定程序，可能严重影响司法公正，不能补正或作出合理解释的（裁量排除）
  - 民事：以严重侵害他人合法权益、违反法律禁止性规定或严重违背公序良俗的方法形成或获取的证据

Step 6: Review of relevance

审查要点清单：
□ 证据与待证事实之间是否存在逻辑关联？
□ 关联是直接的还是间接的？
  - 直接证据：能够单独直接证明待证事实
  - 间接证据：需要与其他证据结合才能证明待证事实
□ 证据的关联程度如何？（强关联/中等关联/弱关联）
□ 证据是否与案件争议焦点相关？
□ 间接证据的推理链条是否合理、完整？
□ 是否存在"关联性过弱"导致不具有证据价值的情况？

Stage 3: Assessment of probative force

Step 7: Assessment of the probative force of a single piece of evidence

Apply different assessment rules according to the type of evidence:

7.1 Rules for assessing the probative force of documentary evidence

Assessment factors	High probative force	Low probative force
Form of carrier	Original	Copy (cannot be checked against the original)
Creator	State organs, notarial institutions	Privately created
Manner of formation	Normally formed in the course of business activities	Specially created during litigation
Nature of content	Statements unfavorable to the creator	Statements favorable to the creator
Signature and seal situation	Complete signature, seal, and date	No signature or signature is questionable

7.2 Rules for assessing the probative force of witness testimony

Assessment factors	High probative force	Low probative value
Perception method	Personal perception	Hearsay/speculation/comment
Interest relationship	No interest relationship with the parties	Has an interest relationship with one party
Court appearance	Appeared in court and was subject to cross-examination	Only submitted written testimony without appearing in court
Cognitive ability	Has normal cognition, memory, and expression ability	Limited cognitive ability (young age, mental disorder, etc.)
Consistency	Prior and subsequent statements are consistent	Prior and subsequent statements contradict or were changed multiple times
Degree of detail	Detailed and specific	General and vague

7.3 Rules for Assessing the Probative Value of Electronic Data

Assessment factors	High probative value	Low probative value
Preservation method	Notarized preservation/blockchain preservation/original records from a third-party platform	Printed screenshot
Completeness	Complete data chain (generation-storage-transmission-extraction)	Fragmentary interception, lacking context
Tamper resistance	Has hash value verification/timestamp	Cannot prove it has not been tampered with
Extraction procedure	Extracted by a professional institution in accordance with law	Extracted by the party itself
Proof of relevance	Can prove association with a specific subject (such as real-name authentication)	Cannot confirm the user's identity

7.4 Rules for Assessing the Probative Value of Expert Opinions

Assessment factors	High probative value	Low probative value
Appraisal institution	Has statutory qualifications and a good reputation	Qualifications are questionable or appraisal exceeds scope
Appraiser	Has corresponding professional competence and practice qualifications	Qualifications do not match or grounds for recusal exist
Test materials	Clear source and complete chain of custody	Unknown source or broken chain of custody
Appraisal method	Uses national standards or industry-recognized methods	Method is nonstandard or outdated
Appraisal process	Complete records, repeatable and verifiable	Process records are missing
Wording of conclusion	Clear and specific	Vague, with too many conditions attached

7.5 Rules for Assessing the Probative Value of Party Statements

Assessment factors	High probative value	Low probative value
Nature of content	Unfavorable to the stating party (admission)	Favorable to the stating party
Consistency	Consistent throughout	Contradictory
Corroboration	Corroborated by other evidence	Isolated evidence, no corroboration
Degree of specificity	Specific and detailed	General and evasive

Step 8: Analysis of Corroborating Relationships Between Evidence

分析框架：
1. 绘制证据关系图
   - 标注每项证据指向的待证事实
   - 标注证据之间的印证关系（一致/矛盾/补充）
   
2. 识别印证模式
   - 完全印证：多项证据在关键事实上完全一致
   - 部分印证：在主要事实上一致，细节有差异
   - 相互矛盾：证据之间存在不可调和的矛盾
   
3. 矛盾分析与处理
   - 分析矛盾产生的原因（记忆偏差/立场不同/证据伪造）
   - 判断矛盾是否影响核心事实认定
   - 确定矛盾证据的取舍规则

Step 9: Evidence Chain Integrity Assessment

评估标准：
□ 证据链是否覆盖全部待证事实的关键环节？
□ 证据链中是否存在断裂（某个关键环节缺乏证据支持）？
□ 间接证据是否形成了完整的逻辑链条？
□ 证据链得出的结论是否具有唯一性（刑事案件）或高度盖然性（民事案件）？
□ 是否存在合理的替代解释未被排除？

Phase 4: Comprehensive Judgment and Conclusion

Step 10: Comprehensive Probative Force Judgment

1. 对每项待证事实，汇总所有相关证据的评估结果
2. 权衡正反两方面证据的证明力
3. 对照适用的证明标准，判断待证事实是否成立
4. 对不确定的事实，明确标注并说明原因

Step 11: Form an Assessment Conclusion

结论类型：
- 证据充分：待证事实达到证明标准，可以认定
- 证据基本充分：主要事实有证据支持，个别细节需补强
- 证据不足：未达到证明标准，待证事实难以认定
- 证据矛盾：正反证据势均力敌，需进一步调查

Step 12: Propose Reinforcement Suggestions

针对证据薄弱环节，提出：
- 需要补充收集的证据类型和内容
- 现有证据的固定和保全建议
- 质证策略建议（如申请证人出庭、申请鉴定等）
- 举证期限和程序提醒

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III. Comparison of Common Fields and Legal Sources

3.1 Civil Litigation Evidence Rules

Rule	Legal Basis	Core Content
Documentary Evidence Submission Rule	Articles 47-49 of the Provisions on Civil Evidence	If the party controlling the documentary evidence refuses to submit it without justified reason, the court may find the opposing party's claim established
Admission Rule	Articles 3-9 of the Provisions on Civil Evidence	A party's acknowledgment of an unfavorable fact exempts the opposing party from the burden of proof; in a joint action, one person's admission does not automatically extend to others
Evidence Preservation	Article 84 of the Civil Procedure Law	If evidence may be lost or difficult to obtain later, preservation may be applied for
Time Limit for Adducing Evidence	Articles 51-56 of the Provisions on Civil Evidence	Legal consequences of submitting evidence after the deadline (admonition, fine, but not lightly excluded)
Electronic Data Rule	Articles 14-15 of the Provisions on Civil Evidence	Scope definition of electronic data and elements for reviewing authenticity
Extraterritorial Evidence	Article 16 of the Provisions on Civil Evidence	Evidence formed outside the territory shall undergo notarization and authentication procedures

3.2 Criminal Litigation Evidence Rules

Rule	Legal Basis	Core Content
Exclusion of Illegal Evidence	Article 56 of the Criminal Procedure Law; Provisions on Several Issues Concerning the Strict Exclusion of Illegal Evidence in the Handling of Criminal Cases	Confessions obtained through torture are absolutely excluded; illegal physical evidence is excluded at discretion
Standard of Evidence Being Reliable and Sufficient	Article 55 of the Criminal Procedure Law	Facts of conviction and sentencing are all proven by evidence; the evidence used as the basis for deciding the case has been verified as true through legal procedures; the evidence in the entire case, taken as a whole, excludes reasonable doubt
Witness Appearance in Court	Articles 252-256 of the Interpretation of the Criminal Procedure Law	If the public prosecutor, a party, or the defense has objections to witness testimony and such testimony has a major impact on conviction and sentencing, the witness shall appear in court
Evidence Standard for Death Penalty Cases	Provisions on Several Issues Concerning the Examination and Judgment of Evidence in Death Penalty Cases	The strictest evidence standards apply to death penalty cases
Technical Investigation Evidence	Article 152 of the Criminal Procedure Law	Materials collected through technical investigation measures may be used as evidence, but require approval
Correction of Defective Evidence	Relevant provisions of the Interpretation of the Criminal Procedure Law	If the collection procedure has defects but can be corrected or reasonably explained, it may be adopted

3.3 Administrative Litigation Evidence Rules

Rule	Legal Basis	Core Content
Defendant's Burden of Proof	Article 34 of the Administrative Litigation Law	The defendant bears the burden of proof regarding the legality of the administrative act
Restrictions on Evidence Collection by the Defendant	Article 35 of the Administrative Litigation Law	The defendant may not collect evidence from the plaintiff or witnesses on its own during litigation
Time limit for the defendant to present evidence	Article 67 of the Administrative Litigation Law	The defendant shall submit evidence within 15 days from the date of receipt of the copy of the complaint
Court collection of evidence	Article 40 of the Administrative Litigation Law	The court has the power to collect evidence from the relevant administrative organs as well as other organizations and citizens
Review of normative documents	Article 53 of the Administrative Litigation Law	Normative documents below rules may be subject to incidental review

3.4 Special Rules for Special Types of Evidence

Type of evidence	Key rules	Points to note
Notarized documents	Notarized documents have priority in probative force; except where contrary evidence is sufficient to overturn them	Note whether the notarization procedure is lawful; whether the notarial certificate is within its validity period
Extraterritorial evidence	Must be notarized by a notary organ of the country where it is located and authenticated by our country's embassy or consulate in that country	Special rules apply to evidence from Hong Kong, Macao, and Taiwan
Audiovisual materials	Audiovisual materials of doubtful authenticity cannot alone serve as the basis for determining the facts of a case	Note whether they were lawfully obtained; whether they have undergone technical appraisal
Electronic data	The completeness and reliability of generation, storage, transmission, and extraction need to be reviewed	Note the difference in probative force between the platform's original records and screenshots
Expert assistant opinions	An expert assistant appears in court to offer opinions on appraisal opinions or professional issues	Does not belong to the statutory categories of evidence, but may affect the acceptance of appraisal opinions

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IV. Verification and Screening Rules

4.1 Screening for Admissibility of Evidence (Threshold Review)

第一关：形式审查
├── 是否属于法定证据种类？ → 否 → 不予采纳
├── 是否在举证期限内提交？ → 否 → 审查是否有正当理由
├── 是否符合法定形式要求？ → 否 → 审查能否补正
└── 通过 → 进入第二关

第二关：合法性审查
├── 是否存在非法证据排除事由？ → 是 → 启动排除程序
├── 取证程序是否存在瑕疵？ → 是 → 审查能否补正/合理解释
├── 取证手段是否侵犯合法权益？ → 是 → 审查严重程度
└── 通过 → 进入第三关

第三关：关联性审查
├── 与待证事实是否存在逻辑关联？ → 否 → 不予采纳
├── 关联程度是否足以具有证据价值？ → 否 → 不予采纳
└── 通过 → 进入证明力评估

第四关：真实性审查
├── 证据载体是否真实？ → 存疑 → 申请鉴定/补强
├── 证据内容是否真实？ → 存疑 → 结合其他证据综合判断
└── 通过 → 确定证明力等级

4.2 Priority Rules for Probative Force (Civil Litigation)

According to the Provisions on Civil Evidence and judicial practice, probative force generally follows the following order of priority:

1. 国家机关、社会团体依职权制作的公文书证 > 其他书证
2. 物证、档案、鉴定意见、勘验笔录、经公证或登记的书证 > 其他书证、视听资料、证人证言
3. 原始证据 > 传来证据
4. 直接证据 > 间接证据
5. 与一方当事人有利害关系的证人出具的证言 < 其他证人证言
6. 出庭作证的证人证言 > 未出庭的书面证言
7. 数个种类不同、内容一致的证据 > 一个孤立的证据

4.3 Evidence That Cannot Alone Serve as the Basis for Determining Facts

The following evidence cannot alone serve as the basis for determining the facts of a case and requires corroboration by other evidence:

民事诉讼中：
- 未成年人所作的与其年龄和智力状况不相当的证言
- 与一方当事人或其代理人有利害关系的证人陈述的证言
- 存有疑点的视听资料、电子数据
- 无法与原件、原物核对的复印件、复制品
- 无正当理由未出庭作证的证人证言

刑事诉讼中：
- 生理上、精神上有缺陷，对案件事实的认知和表达存在一定困难，但尚未丧失正确认知、表达能力的被害人、证人和被告人所作的陈述、证言和供述
- 与被告人有利害关系的证人所作的有利被告人的证言
- 有其他证据印证的被告人供述（孤证不能定案原则）

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V. Output Format Templates

5.1 Single Item of Evidence Assessment Form

## 证据评估表

### 基本信息
| 项目 | 内容 |
|------|------|
| 证据编号 | [编号] |
| 证据名称 | [名称] |
| 证据种类 | [书证/物证/电子数据/证人证言/鉴定意见/...] |
| 提交方 | [原告/被告/第三人] |
| 证据形式 | [原件/复印件/...] |
| 拟证明事实 | [具体待证事实] |

### 三性审查

#### 真实性评估
- **评估结论：** [真实/存疑/不真实]
- **评估依据：** [具体分析]
- **风险点：** [如有]

#### 合法性评估
- **评估结论：** [合法/存在瑕疵/不合法]
- **评估依据：** [具体分析]
- **风险点：** [如有]

#### 关联性评估
- **评估结论：** [直接关联/间接关联/关联性不足]
- **评估依据：** [具体分析]
- **关联程度：** [强/中/弱]

### 证明力评估
- **单一证明力等级：** [高/中/低]
- **是否需要补强：** [是/否]
- **补强建议：** [如需要]

### 综合评估
- **可采性结论：** [可采纳/有条件采纳/不可采纳]
- **置信度：** [★★★★★/★★★★☆/★★★☆☆/★★☆☆☆/★☆☆☆☆]
- **特别提示：** [如有]

5.2 Comprehensive Assessment Report on All Evidence in the Case

# 全案证据综合评估报告

## 一、案件基本信息
| 项目 | 内容 |
|------|------|
| 案件类型 | [民事/刑事/行政] |
| 案由 | [具体案由] |
| 适用证明标准 | [排除合理怀疑/高度盖然性/...] |
| 证据总数 | [X]项 |
| 评估日期 | [日期] |

## 二、待证事实与举证责任分配
| 序号 | 待证事实 | 举证责任方 | 证明标准 |
|------|---------|-----------|---------|
| 1 | [事实1] | [原告/被告] | [标准] |
| 2 | [事实2] | [原告/被告] | [标准] |

## 三、逐项证据评估摘要
| 证据编号 | 证据名称 | 种类 | 真实性 | 合法性 | 关联性 | 证明力 | 可采性 |
|----------|---------|------|--------|--------|--------|--------|--------|
| 1 | [名称] | [种类] | [结论] | [结论] | [结论] | [等级] | [结论] |

## 四、证据链分析
### 4.1 证据关系图
[描述证据之间的印证/矛盾关系]

### 4.2 证据链完整性评估
| 待证事实 | 支持证据 | 反对证据 | 证据链状态 | 是否达到证明标准 |
|---------|---------|---------|-----------|----------------|

## 五、综合评估结论
### 5.1 各待证事实认定情况
| 待证事实 | 认定结论 | 置信度 | 说明 |
|---------|---------|--------|------|

### 5.2 总体评估
[对全案证据情况的综合评价]

## 六、补强建议
| 优先级 | 建议内容 | 目的 | 可行性 |
|--------|---------|------|--------|

## 七、风险提示
[列出证据方面的主要风险和应对建议]

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VI. Confidence Level Annotation System

6.1 Confidence Level of a Single Item of Evidence

Level	Symbol	Meaning	Typical circumstances
Very high	★★★★★	The three attributes of evidence are all unquestionable, and probative force is strong	Original official documentary evidence issued by a state organ; original notarized contract; original bank transaction records
Relatively high	★★★★☆	The three attributes of evidence are basically unquestionable, and probative force is relatively strong	Original documentary evidence with signatures or seals; testimony of a witness with no interest relationship who appears in court and accepts cross-examination; appraisal opinion issued by a qualified appraisal institution
Medium	★★★☆☆	The evidence has certain defects but can be corrected, and probative force is ordinary	Photocopies but corroborated by other evidence; written witness testimony where the witness did not appear in court but there is a reasonable excuse; evidence with procedural defects that have been corrected
Relatively low	★★☆☆☆	The evidence has obvious defects, and probative force is weak	Photocopies that cannot be verified against the originals; testimony of witnesses with an interest in the case; screenshots of electronic data of unknown origin
Extremely low	★☆☆☆☆	There are serious problems with the three attributes of evidence, and it basically has no probative force	Evidence suspected of being forged; evidence obtained illegally; evidence unrelated to the facts to be proved

6.2 Confidence level of the comprehensive conclusion

Level	Meaning	Description
Certain	The assessment conclusion is highly reliable	The legal rules are clear, the evidentiary situation is clear, and there is no room for dispute
Relatively certain	The assessment conclusion is relatively reliable	The main basis is clear, but there are individual factors requiring the judge's discretion
General	The assessment conclusion has certain reference value	It involves many subjective judgment factors, and different judges may make different determinations
Uncertain	The assessment conclusion is for reference only	The evidentiary situation is complex, there are multiple reasonable interpretations, and the conclusion may change due to new evidence
Highly uncertain	The reliability of the assessment conclusion is low	Key information is missing, making an effective assessment impossible; it is recommended to supplement the information and reassess

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VII. Common Errors and Prevention

7.1 Fatal Error Table

Number	Error type	Error description	Consequence	Preventive measures
F-01	Confusing the evidence rules of different types of litigation	Applying the evidence rules of civil litigation to criminal cases, or vice versa	The evidence assessment conclusion is completely wrong, which may lead to serious legal consequences	Before starting the assessment, the type of litigation must first be confirmed, and the corresponding evidence rule system must be invoked
F-02	Confusing the standards of proof	Applying the "beyond a reasonable doubt" standard in civil cases, or applying the "high degree of probability" standard in criminal cases	Incorrect conclusion on the determination of the facts to be proved	Clearly indicate the applicable standard of proof, and judge against that standard in the conclusion
F-03	Omitting the review of exclusion of illegal evidence	Failing to identify illegal evidence that should be excluded	Including inadmissible evidence in the assessment, contaminating the overall conclusion	Conduct a legality review of each piece of evidence, with special attention to the means and procedures of evidence collection
F-04	Ignoring the allocation of the burden of proof	Failing to correctly identify the party bearing the burden of proof, resulting in a favorable determination for the party with insufficient evidence	Directional error in fact-finding	Clarify the party bearing the burden of proof for each fact to be proved before the assessment
F-05	Confusing admissibility of evidence with probative force	Still assessing the probative force of evidence that lacks admissibility (is inadmissible)	The assessment logic is chaotic, and the conclusion is unreliable	Strictly follow the order of "first review admissibility of evidence, then assess probative force"
F-06	Deciding a case based on isolated evidence	Determining key facts based on a single piece of evidence without reviewing whether corroboration is required	Violating the corroborative evidence rule, making the conclusion unreliable	Always check whether key facts have corroborating evidence, especially in criminal cases
F-07	Ignoring the temporal dimension of evidence	Failure to examine the relationship between the time the evidence was formed and the time the case facts occurred	May admit evidence that was fabricated after the fact or is unrelated to the case	Place the evidence within the case timeline to examine its temporal reasonableness

7.2 Common Pitfalls

Number	Pitfall Description	Identification Method	Response Strategy
T-01	Photocopy Pitfall: The party submits only a photocopy, claiming the original is lost	Check whether there is a record of verification against the original; whether there is a reasonable explanation for the loss	Examine whether the photocopy is corroborated by other evidence; note the risk that a photocopy alone cannot serve as the basis for a decision
T-02	Electronic Data Screenshot Pitfall: Submitting only screenshots of chat records rather than the original data	Check whether there is complete conversational context; whether it has been preserved through notarization	Recommend providing the original electronic data or a complete record preserved through notarization; lower the level of probative force during assessment
T-03	Expert Opinion Authority Pitfall: Over-reliance on expert opinions without examining their basis	Check the qualifications of the appraisal institution, the qualifications of the appraiser, the source of the inspection materials, and the appraisal methods	Conduct a comprehensive review of expert opinions, and do not relax review standards because of their "professionalism"
T-04	Admission Withdrawal Pitfall: One party admits a fact and then attempts to withdraw the admission	Check whether the withdrawal of the admission was consented to by the other party; whether there is sufficient evidence proving the admission is inconsistent with the facts	Strictly apply the rules on admissions and examine whether the conditions for withdrawal are satisfied
T-05	Concealed Interest of Witnesses: A witness appears to have no interest, but in fact has a concealed interest connection	Conduct an in-depth examination of the witness's relationship with the parties (relatives, friends, colleagues, business partners, etc.)	Conduct a comprehensive investigation of the witness's background, and lower the probative force of witness testimony where an interest relationship may exist
T-06	Post Hoc Evidence Collection in Administrative Litigation: An administrative organ supplements evidence collection during litigation	Check whether the time the evidence was formed is before the administrative act was made	Evidence collected by an administrative organ during litigation cannot in principle serve as the basis for the legality of the administrative act
T-07	Evidence Ambush: One party suddenly submits new evidence during the court hearing	Check whether it is within the evidence submission period; whether it constitutes "new evidence"	Examine whether it falls under an exception to overdue evidence submission; whether the other party has a sufficient opportunity to cross-examine
T-08	Selective Submission of Evidence: A party submits only favorable evidence and conceals unfavorable evidence	Examine the completeness of the evidence; whether there are obvious information gaps	Note the possible risk of evidence concealment; recommend applying to the court for investigation and evidence collection or requiring the other party to submit it

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VIII. Handling of Special Scenarios

8.1 Procedure for Exclusion of Illegal Evidence

触发条件：
- 刑事案件中，辩护方提出排除非法证据的申请
- 民事案件中，一方主张对方证据系非法取得

处理流程：
1. 审查排除申请是否提供了相关线索或材料
2. 区分绝对排除与裁量排除
   - 绝对排除（刑事）：刑讯逼供等非法方法取得的供述；暴力、威胁取得的证人证言和被害人陈述
   - 裁量排除（刑事）：物证、书证取证程序违法，可能严重影响司法公正，且不能补正或合理解释
   - 民事排除：严重侵害他人合法权益、违反法律禁止性规定或严重违背公序良俗
3. 审查公诉机关/取证方的合法性证明
4. 判断是否达到排除标准
5. 评估排除后对全案证据体系的影响

注意事项：
- "毒树之果"规则在我国的适用有限，非法证据的派生证据不当然排除
- 重复性供述的排除需要具体分析（更换讯问人员后的供述可能不排除）
- 瑕疵证据与非法证据的区分：瑕疵证据可以补正，非法证据应当排除

8.2 Special Review of Electronic Data

审查框架：
1. 生成环节
   - 电子数据的生成系统是否正常运行？
   - 是否有人为干预数据生成过程？
   
2. 存储环节
   - 存储介质是否安全可靠？
   - 是否有防篡改措施（如区块链、时间戳）？
   - 存储期间是否有被修改的可能？
   
3. 传输环节
   - 传输过程是否完整？
   - 是否存在数据丢失或损坏？
   
4. 提取环节
   - 提取主体是否适格？
   - 提取方法是否科学规范？
   - 是否制作了提取笔录？
   - 是否有见证人？
   
5. 展示环节
   - 展示内容是否与原始数据一致？
   - 格式转换是否影响内容完整性？

常见电子数据类型的特殊审查要点：
- 微信/QQ聊天记录：账号实名认证情况、是否为完整对话、是否经过公证
- 电子邮件：邮件头信息、发送/接收服务器记录、是否有数字签名
- 网页内容：是否经过公证保全、网页是否可能被修改
- 电子合同：电子签名是否符合《电子签名法》要求
- 监控录像：设备运行状态、时间校准情况、存储介质完整性

8.3 Special Handling of Extraterritorial Evidence

处理规则：
1. 在中华人民共和国领域外形成的证据：
   - 应当经所在国公证机关证明
   - 并经中华人民共和国驻该国使领馆认证
   - 或者履行中华人民共和国与该所在国订立的有关条约中规定的证明手续

2. 港澳台地区证据：
   - 香港：经司法部委托的香港律师公证
   - 澳门：经中国法律服务（澳门）公司公证
   - 台湾：经当地公证机关公证，并经海基会/海协会等机构确认

3. 外文证据：
   - 应当附有中文译本
   - 译本应当经有资质的翻译机构翻译

审查要点：
□ 公证认证手续是否完备？
□ 公证认证链条是否完整？
□ 翻译是否准确？（如有争议，可申请重新翻译）
□ 域外证据的内容是否符合我国法律的实质要求？

8.4 Emergency Handling of Evidence Preservation

触发条件：
- 证据可能灭失
- 证据以后难以取得
- 对方当事人可能销毁证据

处理建议：
1. 诉前保全：向证据所在地、被申请人住所地或对案件有管辖权的法院申请
2. 诉中保全：向受理案件的法院申请
3. 公证保全：对电子数据、现场状况等进行公证保全
4. 律师见证：在紧急情况下先行律师见证固定证据

注意事项：
- 诉前保全需在法院采取保全措施后30日内起诉
- 保全申请应说明证据的基本情况和保全的必要性
- 可能需要提供担保

8.5 Handling of Evidentiary Conflicts

矛盾类型与处理方法：

1. 同一证人前后陈述矛盾
   → 审查变更原因；以庭审陈述为准（有合理解释的除外）
   → 降低该证人证言的整体证明力

2. 不同证人证言之间矛盾
   → 审查各证人的感知条件、利害关系、认知能力
   → 适用证明力优先规则判断取舍
   → 必要时申请证人对质

3. 书证与证人证言矛盾
   → 一般情况下书证证明力优于证人证言
   → 但需审查书证的真实性和形成背景

4. 鉴定意见之间矛盾（多次鉴定）
   → 审查各鉴定的检材、方法、鉴定人资质
   → 必要时申请重新鉴定或补充鉴定
   → 法院可组织鉴定人出庭质证

5. 当事人陈述与客观证据矛盾
   → 客观证据（物证、书证、电子数据等）一般优先于当事人陈述
   → 当事人陈述与客观证据矛盾的，可能影响其整体陈述的可信度

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IX. Quality Inspection Checklist

9.1 Pre-assessment Check

□ 是否已确认案件的诉讼类型（民事/刑事/行政）？
□ 是否已确认适用的证据规则体系？
□ 是否已明确全部待证事实？
□ 是否已正确分配举证责任？
□ 是否已确定适用的证明标准？
□ 是否已收集全部需要评估的证据材料信息？
□ 是否已了解案件的争议焦点？

9.2 During-assessment Check

□ 是否对每项证据都进行了三性审查？
□ 是否严格按照"先证据能力，后证明力"的顺序评估？
□ 是否注意区分了不同证据种类的特殊审查规则？
□ 是否审查了非法证据排除的可能性？
□ 是否分析了证据之间的印证和矛盾关系？
□ 是否评估了证据链的完整性？
□ 是否注意了需要补强的证据？
□ 是否考虑了对方可能的质证意见？
□ 是否对不确定的判断标注了置信度？

9.3 Post-assessment Check

□ 评估结论是否与适用的证明标准相对照？
□ 是否对每项待证事实都给出了明确的认定意见？
□ 是否标注了评估结论的置信度？
□ 是否提出了证据补强建议？
□ 是否识别了主要的证据风险？
□ 输出格式是否完整、规范？
□ 是否存在逻辑矛盾或遗漏？
□ 是否已声明AI评估的局限性？
□ 是否建议由专业人员审核？

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10. Complete Example

Example 1: Simple Scenario—Evidence Assessment in a Private Lending Dispute

Case Background

Plaintiff Zhang sued defendant Li in a private lending dispute, claiming that Li borrowed RMB 500,000 from him on March 15, 2023, with an agreed annual interest rate of 12% and a one-year loan term, and did not repay upon maturity.

Evidence Submitted by the Plaintiff

No.	Evidence Name	Evidence Type	Form
Evidence 1	IOU	Documentary Evidence	Original
Evidence 2	Bank Transfer Record	Documentary Evidence/Electronic Data	Original transaction statement issued by the bank
Evidence 3	Screenshot of WeChat Chat Records	Electronic Data	Printout (not notarized)
Evidence 4	Written Testimony of Witness Wang	Witness Testimony	Written testimony (witness did not appear in court)

Defendant's Cross-examination Opinions

• On Evidence 1: Acknowledges the authenticity of the signature on the IOU, but claims that 300,000 yuan has already been repaid
• On Evidence 2: No objection
• On Evidence 3: Does not acknowledge authenticity, claiming the screenshot may have been tampered with
• On Evidence 4: Does not acknowledge it; the witness did not appear in court, and Wang is the plaintiff's colleague

Assessment Process

I. Determine the Assessment Framework

• Type of litigation: Civil litigation
• Cause of action: Private lending dispute
• Applicable evidence rules: the Civil Procedure Law and the Provisions on Civil Evidence
• Standard of proof: High probability
• Burden of proof: The plaintiff bears the burden of proving the establishment of the lending relationship and the delivery of the loan; the defendant bears the burden of proving repayment of 300,000 yuan

II. Facts to Be Proved

Serial No.	Facts to Be Proved	Party Bearing the Burden of Proof
1	Existence of mutual agreement to lend (both parties agreed on a loan of 500,000 yuan, an annual interest rate of 12%, and a one-year term)	Plaintiff
2	Actual delivery of the loan (500,000 yuan was actually delivered to the defendant)	Plaintiff
3	Defendant has repaid 300,000 yuan	Defendant

III. Item-by-item Evidence Assessment

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Evidence 1: IOU (Original)

Review Item	Assessment Conclusion	Analysis
Authenticity	✅ Authentic	The defendant acknowledges the authenticity of the signature; the IOU is the original; the content includes complete elements such as loan amount, interest rate, and term
Legality	✅ Legal	It was voluntarily signed by the parties; the form is legal; the content does not violate mandatory prohibitions of law; the annual interest rate of 12% does not exceed the statutory upper limit
Relevance	✅ Directly relevant	Directly proves the existence of mutual agreement to lend and is directly related to Fact to Be Proved 1
Probative Value	High	Original documentary evidence; the defendant acknowledges the authenticity of the signature; directly proves the mutual agreement to lend
Confidence	★★★★★	The defendant has admitted the signature is genuine; it is an original documentary piece of evidence with extremely strong probative force.

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Evidence 2: Bank transfer record (original)

Review item	Assessment conclusion	Analysis
Authenticity	✅ Genuine	Original transaction statement issued by the bank, to which the defendant raised no objection.
Legality	✅ Legal	Issued by the bank in accordance with the law, lawful in form.
Relevance	✅ Directly relevant	It shows that on March 15, 2023, 500,000 yuan was transferred from the plaintiff's account to the defendant's account, consistent with the loan date and amount recorded in the IOU, directly proving the fact that the loan was delivered.
Probative force	High	Original records issued by a state financial institution, highly objective and highly probative.
Confidence level	★★★★★	Bank original records, no objection from the defendant, extremely strong probative force.

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Evidence 3: Screenshots of WeChat chat records (printed copies, not notarized)

Review item	Assessment conclusion	Analysis
Authenticity	⚠️ Doubtful	Only printed screenshots, not notarized or preserved; the defendant does not acknowledge their authenticity; the possibility of tampering cannot be ruled out; lacking complete conversational context.
Legality	✅ Basically legal	They are normal communication records between the parties, and the method of obtaining them is not unlawful.
Relevance	✅ Indirectly relevant	The chat content involves debt collection and is related to the loan relationship, but it is indirect evidence.
Probative force	Low	Printed screenshots are hearsay evidence, the defendant does not acknowledge them, and they have not been notarized or preserved, so they cannot alone serve as the basis for finding facts.
Confidence level	★★☆☆☆	Authenticity is doubtful and corroboration is needed.

Corroboration suggestions:

1. It is recommended that the plaintiff provide the original chat records on the mobile phone and display them in court.
2. Or apply for notarization and preservation of the WeChat chat records.
3. Or obtain the original communication records from the WeChat operator (Tencent).

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Evidence 4: Written testimony of witness Wang (witness did not appear in court)

Review item	Assessment conclusion	Analysis
Authenticity	⚠️ Doubtful	The witness did not appear in court to undergo cross-examination, so the authenticity of the testimony cannot be verified.
Legality	⚠️ Defective	The defendant objects to the witness testimony, and the witness should have appeared in court to testify but did not; it is necessary to examine whether there is a legitimate reason for not appearing.
Relevance	✅ Indirectly relevant	The witness claims to have been present to witness the loan process, which is relevant to the facts to be proved.
Probative force	Low	The witness is the plaintiff's colleague (there is an interest relationship); did not appear in court to testify; belongs to the type of evidence that cannot alone serve as the basis for finding facts (testimony of a witness with an interest relationship with one party + written testimony without appearing in court).
Confidence level	★★☆☆☆	With two impairing factors combined, the probative force is relatively weak.

Corroboration suggestions:

1. Apply for witness Wang to appear in court to testify and be cross-examined
2. If the witness indeed has legitimate reasons for being unable to appear in court, relevant supporting materials should be submitted
3. Look for other witnesses without an interest relationship

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IV. Analysis of the chain of evidence

Fact to be proved 1 (agreement to lend):

• Evidence 1 (original loan receipt): direct proof, high probative value ★★★★★
• Evidence 3 (WeChat screenshot): indirect corroboration, low probative value ★★☆☆☆
• Evidence 4 (witness testimony): indirect corroboration, low probative value ★★☆☆☆
• Conclusion: The original loan receipt has fully proved the agreement to lend; even without considering Evidence 3 and 4, the fact to be proved 1 has reached the high probability standard. ✅ Fact established

Fact to be proved 2 (delivery of the loan):

• Evidence 2 (bank transfer record): direct proof, high probative value ★★★★★
• Evidence 1 (loan receipt): indirect corroboration (a loan receipt is usually issued after the loan is received)
• Conclusion: The bank transfer record and the loan receipt corroborate each other, fully proving that 500,000 yuan was actually delivered. ✅ Fact established

Fact to be proved 3 (the defendant has repaid 300,000 yuan):

• The defendant claims to have repaid 300,000 yuan but has not submitted any evidence (such as transfer records, receipts, etc.)
• The burden of proof lies with the defendant
• Conclusion: The defendant has not fulfilled the burden of proof. ❌ Fact not established (before the defendant supplements evidence)

V. Comprehensive assessment conclusion

Fact to be proved	Finding	Confidence level	Explanation
Agreement to lend exists	✅ Established	Certain	Original loan receipt + defendant's admission of signature, evidence is sufficient
The loan of 500,000 yuan has been delivered	✅ Established	Certain	Bank transfer record + loan receipt corroborate each other, evidence is sufficient
The defendant has repaid 300,000 yuan	❌ Not established (for now)	Relatively certain	The defendant has not presented evidence, but attention should be paid to whether the defendant supplements evidence within the evidence period

VI. Suggestions for reinforcement

Priority	Suggestion	Purpose	Feasibility
High	Notarize and preserve the WeChat chat records or display the original records in court	Reinforce proof of the fact of demand for repayment	High
Medium	Apply for witness Wang to appear in court to testify	Enhance the probative value of the witness testimony	Medium
Low	Pay attention to whether the defendant submits evidence of repayment of 300,000 yuan	Prepare a rebuttal	—

VII. Risk warnings

1. Main risk: The defendant may supplement and submit evidence of repayment of 300,000 yuan (such as transfer records) within the evidence period, and a response plan needs to be prepared in advance
2. Secondary risk: If the WeChat chat records are not reinforced, they may not be admitted under strong challenge by the opposing party, but this does not affect the determination of the core facts
3. Overall assessment: The plaintiff's core evidence (the original IOU + bank transfer records) has strong probative force, the chain of evidence is complete, and the likelihood of winning the case is relatively high.

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Example Two: Complex Scenario—Evidence Assessment in a Criminal Case (Crime of Intentional Injury)

Case Background

The public prosecution authority alleges that on the evening of January 20, 2024, at a certain bar, the defendant Zhao had a dispute with the victim Qian over a trivial matter; Zhao struck Qian on the head with a beer bottle, causing Qian serious injury of the second degree. After being brought in, Zhao first confessed to the facts of the crime, and later recanted, claiming it was justifiable defense.

Evidence Submitted by the Public Prosecution Authority

No.	Name of Evidence	Type of Evidence
Evidence 1	Defendant Zhao's confession (first time, incriminating confession)	Defendant's confession and defense
Evidence 2	Defendant Zhao's confession (second time and thereafter, recanting and claiming justifiable defense)	Defendant's confession and defense
Evidence 3	Victim Qian's statement	Victim's statement
Evidence 4	Testimony of witness Sun (bar waiter)	Witness testimony
Evidence 5	Testimony of witness Zhou (Zhao's friend)	Witness testimony
Evidence 6	Bar surveillance video (partial; footage of the key period is blurry)	Audiovisual materials
Evidence 7	Forensic appraisal opinion (Qian's injury is serious injury of the second degree)	Appraisal opinion
Evidence 8	Record and photographs of the scene inspection	Inspection record
Evidence 9	Beer bottle (instrument of the crime)	Physical evidence
Evidence 10	Explanation of the circumstances of Zhao's arrival at the case	Documentary evidence

Issues Raised by the Defense

1. Zhao's first confession was made after continuous interrogation exceeding 24 hours, suspected of fatigue interrogation.
2. The surveillance video shows Qian was the first to push Zhao.
3. The testimony of witness Zhou supports Zhao's claim of justifiable defense.

Assessment Process

I. Determine the Assessment Framework

• Type of litigation: criminal litigation
• Charge: crime of intentional injury (causing serious injury)
• Applicable rules of evidence: the Criminal Procedure Law and the Interpretation of the Criminal Procedure Law
• Standard of proof: beyond a reasonable doubt (evidence is reliable and sufficient)
• Burden of proof: the public prosecution authority bears the burden of proof for the facts of the crime

II. Facts to Be Proved

Serial number	Fact to be proved	Party bearing the burden of proof	Degree of importance
1	Zhao carried out the act of striking Qian on the head with a beer bottle.	Public prosecution authority	Core
2	Zhao had the intent to cause injury.	Public prosecution authority	Core
3	Qian's injury is serious injury of the second degree.	Public prosecution authority	Core
4	There is a causal relationship between Zhao's act and Qian's injury result.	Public prosecution authority	Core
5	Is there a prerequisite for justifiable defense (Qian first committed unlawful infringement)	The defense argues that the prosecution must exclude	Key dispute
6	If a defensive act exists, whether it exceeded the necessary limits	To be determined according to the circumstances	Key dispute

III. Item-by-item evidence assessment

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Evidence 1: Zhao's first statement (guilty statement)

Review item	Assessment conclusion	Analysis
Authenticity	⚠️ Questionable	The defendant has retracted the statement; it is necessary to review whether the content of the statement corroborates with other evidence
Legality	⚠️ Seriously questionable	The defense argues that continuous interrogation exceeded 24 hours, suspected of fatigue interrogation. According to Article 120 of the Criminal Procedure Law, the duration of summons and compulsory appearance shall not exceed 24 hours, and the criminal suspect's food, drink, and necessary rest time shall be guaranteed.Need to review: ① The start and end times recorded in the interrogation transcript; ② synchronized audio and video recordings (if any); ③ entry and exit records of the detention center; ④ explanations of the interrogators
Relevance	✅ Directly relevant	The content of the statement directly involves the facts of the crime
Probative force	Pending	Depends on the result of the legality review
Confidence	★★☆☆☆	There are major doubts about legality and they need to be resolved as a priority

⚠️ Analysis of exclusion of illegal evidence:

1. 审查要点：
   - 讯问笔录记载的时间是否超过法定时限？
   - 是否有同步录音录像？录音录像是否完整？
   - 讯问期间是否保障了饮食和休息？
   - 公诉机关能否提供合法取证的证明？

2. 法律适用：
   - 如确认存在疲劳审讯，该供述可能属于以非法方法收集的供述
   - 根据《关于办理刑事案件严格排除非法证据若干问题的规定》第2条，
     采用非法限制人身自由等非法方法收集的供述应当排除
   - 疲劳审讯在司法实践中通常被认定为变相的非法取证方法

3. 初步判断：
   - 如公诉机关不能提供充分证据证明讯问合法性，该供述存在被排除的较大风险
   - 即使不被排除，其证明力也因翻供而大幅降低

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Evidence 2: Zhao's second and subsequent statements (retraction, claiming justifiable defense)

Review item	Assessment conclusion	Analysis
Authenticity	⚠️ Requires comprehensive judgment	The content of the retraction needs to be verified against other evidence
Legality	✅ No illegal circumstances found	The statement after changing interrogators was procedurally lawful
Relevance	✅ Directly relevant	The defense involving justifiable defense is directly related to the core dispute of the case
Probative force	Medium	The defendant's defense needs to be corroborated by other evidence; but if the first statement is excluded, the stable statement after retraction has certain reference value
Confidence	★★★☆☆	Needs to be judged comprehensively in light of other evidence

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Evidence 3: The statement of the victim Qian

Review item	Assessment conclusion	Analysis
Authenticity	⚠️ Requires careful assessment	As an interested party, the victim's statement may be biased; it is necessary to review whether the statement is consistent throughout; whether it matches objective evidence
Legality	✅ Lawful	Obtained according to law, procedurally lawful
Relevance	✅ Directly relevant	Directly describes the course of the incident
Probative force	Medium to high	The victim personally experienced the course of the incident, but note: ① The victim stated that Zhao started the fight without provocation, which may conflict with the surveillance video (the surveillance shows Qian pushed first); ② The victim suffered a head injury, which may affect memory of the details of the incident.
Confidence level	★★★☆☆	Needs to be compared with objective evidence such as surveillance video

Key contradiction: There is a contradiction between the victim's statement that "Zhao started the fight without provocation" and the surveillance video showing that "Qian first pushed Zhao," and this is the core dispute in this case.

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Evidence 4: Testimony of witness Sun (bar waiter)

Review item	Assessment conclusion	Analysis
Authenticity	✅ Relatively credible	The witness is a bar staff member who was present and witnessed the incident; has no interest relationship with either party
Legality	✅ Legal	Evidence was obtained in accordance with the law, and the procedure was lawful
Relevance	✅ Directly relevant	Witnessed the course of the incident
Probative value	Relatively high	A third-party witness with no interest relationship; however, it is necessary to examine: ① the witness's position and angle of view at the time; ② whether it could be clearly seen who started the fight first; ③ the specific content of the testimony
Confidence level	★★★★☆	A witness with no interest relationship, with relatively strong probative value

Key information: Special attention should be paid to Sun's description of the key fact of "who started the fight first."

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Evidence 5: Testimony of witness Zhou (Zhao's friend)

Review item	Assessment conclusion	Analysis
Authenticity	⚠️ Requires careful assessment	The witness is a friend of the defendant and has an interest relationship
Legality	✅ Legal	Evidence was obtained in accordance with the law, and the procedure was lawful
Relevance	✅ Directly relevant	Witnessed the course of the incident and supports the claim of self-defense
Probative value	Relatively low	Testimony favorable to the defendant given by a witness who has an interest relationship with the defendant has relatively low probative value; it cannot be used alone as the basis for finding facts
Confidence level	★★☆☆☆	The interest relationship reduces probative value, but it can be strengthened if corroborated by other evidence

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Evidence 6: Bar surveillance video (partial, the footage of the key period is blurry)

Review item	Assessment conclusion	Analysis
Authenticity	✅ Basically authentic	Automatically recorded by the bar surveillance system, with strong objectivity; however, the footage of the key period is blurry, which affects the determination of facts
Legality	✅ Legal	Surveillance in a public place, lawfully obtained
Relevance	✅ Directly relevant	Recorded part of the process at the scene of the incident
Probative value	Medium	Objective evidence, whose probative value should originally be relatively high, but it is limited because the footage of the key period is blurry.Identifiable content: It shows that Qian first made a pushing motion toward Zhao;Ambiguous part: The specific process of Zhao striking with the bottle is not clear enough
Confidence	★★★☆☆	Part of the content is clearly legible; part is blurry and needs to be combined with other evidence

Key findings: The identifiable portion of the surveillance footage shows that Qian made a pushing motion first, which contradicts the victim's statement that "Zhao attacked first without provocation" and supports the defense's claim of justifiable defense.

Recommendation: Apply for technical enhancement processing of the surveillance footage to obtain clearer images.

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Evidence 7: Forensic appraisal opinion (Level 2 serious injury)

Review item	Assessment conclusion	Analysis
Authenticity	✅ Authentic	The appraisal institution has statutory qualifications; the appraiser has practice qualifications
Legality	✅ Legal	The commissioning procedure is legal; the appraisal method complies with national standards
Relevance	✅ Directly relevant	Directly proves the injury result
Probative value	High	Forensic appraisal opinion, highly professional, with standardized procedures
Confidence	★★★★★	The appraisal procedure is standardized, and the conclusion is clear

Review points confirmed:

• ✅ Appraisal institution: has judicial appraisal qualifications
• ✅ Appraiser: has forensic clinical appraisal practice qualifications
• ✅ Test material: the victim himself, with a clear source
• ✅ Appraisal standard: based on the "Standards for the Degree of Human Injury"
• ✅ Appraisal conclusion: clearly Level 2 serious injury

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Evidence 8: Scene inspection record and photographs

Review item	Assessment conclusion	Analysis
Authenticity	✅ Authentic	Made by investigators in accordance with law, with witness signatures
Legality	✅ Legal	The inspection procedure is legal, and the record is complete
Relevance	✅ Relevant	Records the conditions of the crime scene and is related to the facts of the case
Probative value	Relatively high	Objectively records the scene conditions
Confidence	★★★★☆	Inspection record with standardized procedures

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Evidence 9: Beer bottle (instrument of crime)

Review item	Assessment conclusion	Analysis
Authenticity	✅ Authentic	Lawfully extracted from the crime scene, with an extraction record and seizure list
Legality	✅ Legal	The extraction and seizure procedures are legal
Relevance	✅ Directly relevant	It is the instrument of crime and directly related to the injurious act
Probative value	Relatively high	Physical evidence, highly objective; probative value would be higher if fingerprint appraisal were available
Confidence	★★★★☆	The chain of custody for the physical evidence is complete

Recommendation: Confirm whether fingerprint extraction and comparison appraisal were conducted.

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Evidence 10: Explanation of the apprehension process

Review item	Assessment conclusion	Analysis
Authenticity	✅ Authentic	Issued by the public security organ
Legality	✅ Legal	Legal in form
Relevance	✅ Relevant	Related to the apprehension circumstances, may involve the determination of voluntary surrender
Probative value	Moderate	Proves the apprehension process, has reference value for sentencing
Confidence level	★★★★☆	—

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IV. Evidence chain analysis and core disputes

4.1 Evidence chain of undisputed facts

Facts to be proved	Supporting evidence	Evidence chain status	Conclusion
Zhao struck Qian on the head with a beer bottle	Evidence 1 (if not excluded), Evidence 2 (admission of striking), Evidence 3, Evidence 4, Evidence 6 (partially visible), Evidence 9	Complete	✅ Can be established
Qian's injury is serious injury level two	Evidence 7	Complete	✅ Can be established
Causation between Zhao's act and the injury result	Evidence 7 + Evidence 8 + Evidence 9	Complete	✅ Can be established

4.2 Core dispute: whether it constitutes justifiable defense

支持正当防卫的证据：
├── 证据2（赵某翻供后的稳定供述）—— 证明力中等
├── 证据5（周某证言，但有利害关系）—— 证明力较低
└── 证据6（监控录像显示钱某先推搡）—— 证明力中等（关键时段模糊）

反对正当防卫的证据：
├── 证据1（赵某第一次有罪供述）—— 合法性存疑，可能被排除
└── 证据3（被害人陈述赵某先动手）—— 与监控矛盾，证明力降低

中立证据：
└── 证据4（孙某证言）—— 需要确认其对"谁先动手"的具体描述

4.3 Analysis of key contradictions

矛盾1：被害人陈述 vs 监控录像
- 被害人称赵某无故先动手
- 监控显示钱某先有推搡动作
- 分析：客观证据（监控录像）一般优于当事人陈述
- 结论：被害人陈述在"谁先动手"这一关键事实上的可信度降低

矛盾2：赵某第一次供述 vs 翻供后供述
- 第一次供述承认故意伤害
- 翻供后主张正当防卫
- 分析：第一次供述合法性存疑；翻供后供述与监控录像部分吻合
- 结论：如第一次供述被排除，翻供后的供述结合监控录像具有一定可信度

矛盾3：证人孙某证言 vs 证人周某证言（假设存在差异）
- 需要具体对比两人对关键事实的描述
- 孙某无利害关系，证明力优先
- 周某有利害关系，证明力较低

V. Comprehensive assessment conclusion

Facts to be proved	Determination conclusion	Confidence level	Explanation
Zhao struck Qian on the head with a bottle	✅ Can be established	Certain	Multiple pieces of evidence consistently prove it
Qian serious injury level two	✅ Can be established	Certain	The forensic appraisal opinion is clear
Causation	✅ Can be established	Certain	The evidence chain is complete
Zhao had intent to cause injury	⚠️ Disputed	Uncertain	If justifiable defense is established, then there is no intent to cause injury
Qian first committed unlawful infringement	⚠️ Supported by certain evidence	Uncertain	Surveillance video shows Qian pushed first, but the image is blurry; it needs to be comprehensively judged in conjunction with witness Sun's testimony
Whether the defense was excessive	⚠️ Requires further analysis	Highly uncertain	Even if unlawful infringement is established, whether striking the head with a beer bottle causing serious injury exceeded the necessary limit still requires argumentation

VI. Key issues and recommendations

Priority	Issue/Recommendation	Purpose
Highest	Initiate the illegal evidence exclusion procedure and review the legality of Zhao's first statement	Determine whether that statement can serve as the basis for the verdict
Highest	Apply for technical enhancement processing of the surveillance video	Obtain clear footage of the critical period
High	Apply for witness Sun to testify in court, focusing questioning on "who struck first"	Obtain testimony from a disinterested third party on the core dispute
High	Review the synchronized audio-video recording of Zhao's first statement	Verify whether there was fatigued interrogation
Medium	Confirm whether Zhao's fingerprints were extracted from the beer bottle	Reinforce the link between the physical evidence and the defendant
Medium	Check whether the bar has surveillance footage from other angles	Obtain a more complete record of the incident

VII. Risk Warnings

1. 【非法证据排除风险】如赵某第一次供述被排除，公诉机关将失去唯一的有罪供述，
   需要完全依靠其他证据证明犯罪事实。

2. 【正当防卫认定风险】监控录像显示钱某先推搡赵某，如该事实被认定，
   则存在正当防卫的前提条件。但即使认定存在不法侵害，
   持啤酒瓶击打头部致重伤是否属于防卫过当仍是关键争议。

3. 【证明标准风险】刑事案件适用"排除合理怀疑"标准。
   在"谁先动手"这一关键事实上，现有证据存在矛盾，
   可能无法排除"钱某先实施不法侵害"的合理怀疑。

4. 【量刑影响】即使不认定正当防卫，如认定被害人有过错（先动手），
   也可能影响量刑。

5. 【总体评估】本案在犯罪行为和伤害结果方面证据充分，
   但在主观故意和正当防卫问题上存在重大争议，
   最终结论高度依赖于：
   (a) 第一次供述的合法性审查结果
   (b) 监控录像技术增强后的画面内容
   (c) 证人孙某对核心事实的证言

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Appendix: Quick Reference Card

Quick Reference Table for Reviewing the "Three Attributes" of Evidence

┌─────────────────────────────────────────────┐
│              证据效力评估速查                    │
├─────────────────────────────────────────────┤
│                                               │
│  第一步：确认诉讼类型 → 选择证据规则体系         │
│  第二步：明确待证事实 → 分配举证责任             │
│  第三步：确定证明标准                           │
│                                               │
│  逐项审查：                                    │
│  ┌─ 真实性：原件？未篡改？内容可信？            │
│  ├─ 合法性：主体？程序？形式？非法排除？         │
│  ├─ 关联性：与待证事实的逻辑关联？程度？         │
│  └─ 证明力：种类规则？补强需要？                │
│                                               │
│  综合判断：                                    │
│  ┌─ 证据间印证/矛盾关系                       │
│  ├─ 证据链完整性                              │
│  ├─ 是否达到证明标准                           │
│  └─ 补强建议                                  │
│                                               │
│  ⚠️ 致命检查：                                │
│  □ 诉讼类型是否正确？                          │
│  □ 证明标准是否正确？                          │
│  □ 非法证据是否已排查？                        │
│  □ 举证责任是否已明确？                        │
│  □ 孤证是否已标注？                            │
└─────────────────────────────────────────────┘