CrimPR Part 19
Definition
Criminal Procedure Rules Part 19 (England and Wales): the expert-witness procedural code requiring disclosure of qualifications, methodology, limitations, and whether the method represents currently recognised standards. Intersects with the FSR Codes of Practice.
- Jurisdiction
- England and Wales
- Core Duty
- Expert's overriding duty is to the court, not the instructing party
- Key Disclosure Requirements
- Qualifications, methodology, limitations, instructions, and range of opinion on the issue
Common questions
What is Criminal Procedure Rules Part 19?+
Part 19 of England and Wales Criminal Procedure Rules sets the procedural requirements for expert evidence in criminal proceedings. It mandates that experts disclose their qualifications, methodology, limitations, and their overriding duty to the court. The rules also require experts to address the range of possible opinions and explicitly prohibit them from acting as advocates.
What must an expert witness include in a report under Part 19?+
Expert reports must disclose the expert's instructions, qualifications, methodology, and any material weaknesses or limitations in the opinion. The report must include a statement confirming the expert's duty to the court comes before their relationship with whoever instructed them. The expert must also address the range of opinion that exists on the issue and verify that their method represents currently recognised standards.
Why does Part 19 require experts to address the range of opinion?+
This requirement ensures the court sees not just one expert's conclusion, but the broader landscape of expert thought on the issue. It guards against bias and helps judges assess whether an expert's opinion falls within accepted practice or represents an outlier position. This transparency is essential for testing reliability in criminal proceedings.
Related terms
- Daubert Standard
- The US federal evidentiary standard (Daubert v. Merrell Dow Pharmaceuticals, 1993) requiring that expert testimony be based on scientifically valid methods with...
- Frye Standard
- The US legal test for admissibility of scientific evidence, originating from Frye v. United States (1923), which required that a technique be...
- Blind Verification
- The procedure in which a second fingerprint examiner independently performs the Analysis and Comparison stages without knowledge of the first examiner's conclusion....
- Sequential Unmasking
- An information-sequencing protocol in which the examiner receives the questioned material first, completes and documents the analysis before receiving the known standards,...
- ACE-V
- Analysis, Comparison, Evaluation, Verification: the four-stage method for latent print examination used by accredited forensic fingerprint laboratories. Analysis examines the latent in...
- ASTM E1618
- Standard Test Method for Ignitable Liquid Residues in Extracts from Fire Debris Samples by Gas Chromatography-Mass Spectrometry. The active analytical standard defining...
- ASTM E2154
- Standard Practice for Passive Headspace Concentration with Activated Charcoal. The most widely used extraction method for volatile ILR components from sealed fire...
- Bharatiya Sakshya Adhiniyam 2023
- India's replacement for the Indian Evidence Act 1872, in force from 1 July 2024. Section 39 carries forward the expert-witness opinion provisions,...
- Black-Box Study
- A study in which qualified examiners are given realistic test cases with known ground truth and asked to make decisions under conditions...
- BSA 2023
- Bharatiya Sakshya Adhiniyam 2023: the Indian evidence statute that replaced the Indian Evidence Act 1872 on 1 July 2024; retains the section...
- BSA 2023 § 39
- Section 39 of the Bharatiya Sakshya Adhiniyam 2023, the provision governing expert opinion evidence in Indian courts. Replaced Indian Evidence Act 1872...
- BSA 2023 § 63
- The electronic record admissibility provision (replacing IEA § 65B), requiring a certificate from a person in a responsible official position confirming the...
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