GB/T 43642-2024Technical specification of forensic personal identification (English PDF)

法医学个体识别技术规范

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

March 15, 2024

Implementation date

July 1, 2024

Scope

GB/T 43642-2024 is the English-translated version of 法医学个体识别技术规范.

GB/T 43642-2024 is the Chinese national standard covering technical specification of forensic personal identification. Issued on 15 March 2024, it has been in force since 1 July 2024.

Document preview — GB/T 43642-2024

National Standard of the People's Republic of China

ICS: 11.020
Classification: C 06

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

PrefaceI
1 Scope1
2 Normative references1
3 Terms and Definitions1
4 Abbreviations2
5 General Requirements2
6 Inspection Procedure2
7 Likelihood Calculation3
8 Expert Opinion4
9 Identification documents4
Appendix A (Normative) Cumulative Individual Identification Capability Calculation5
References6

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1: Structure and drafting rules for standardization documents" Drafting.

Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.

This document is proposed and coordinated by the Ministry of Justice of the People's Republic of China.

This document was drafted by: Institute of Forensic Science, Fudan University, Sichuan University, Sun Yat-sen University, Beijing Municipal Public Security Bureau, Supreme People's Procuratorate Procuratorial Technology Information Research Center of the People's Procuratorate.

The main drafters of this document are: Li Chengtao, Zhang Suhua, Hou Yiping, Sun Hongyu, Liu Yacheng, Xie Jianhui, Li Yuanyuan and He Xiaodan.

Technical specifications for forensic individual identification

1 Scope

This document specifies the general requirements for individual identification of forensic biological specimens, and provides test procedures, likelihood calculations, and identification opinions. and identification documents.

This document is applicable to laboratories conducting individual identification activities of forensic biological specimens.

2 Normative references

The contents of the following documents constitute the essential clauses of this document through normative references in this document.

For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to This document.

GA/T 1162 Specification for the collection, storage and submission of forensic biological specimens GA/T 1163 Analysis and application of human DNA fluorescent marker STR typing results SF/T 0069 Forensic evidence identification laboratory management specification SF/T 0134 Technical specification for nucleic acid extraction from forensic biological samples

3 Terms and definitions

The following terms and definitions apply to this document.

3.1 [Source. GA/T 1972-2021, 3.68]

By testing and identifying the genetic markers of biological samples/specimens, it is determined whether the biological samples/specimens are derived from the same individual.

3.2 Individual identification ability discrimination power; DP

The probability that two individuals are randomly selected from the survey population and that their genetic marker phenotypes are different.

Note. See formula (1) for calculation. DP=1-sum i=1 P2i (1) Where.

n --- the number of phenotypes of a certain genetic marker;

Pi --- the frequency of the i-th phenotype in the population; i=1 P2i --- The probability that two unrelated individuals randomly selected from the survey population will have the same phenotype at a certain locus purely due to chance.

3.3

The probability of obtaining a specific genetic marker phenotype when the biological sample is assumed to be derived from a random individual in the investigated population.

Equal to the estimated frequency P(X) of the genetic marker phenotype in the survey population.

Note. The PM value calculation for autosomal single genetic marker phenotype of homozygous (AA) is shown in formula (2), and the PM value calculation for heterozygous (AB) is shown in formula (3).

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

Editions of GB/T 43642

Edition	Title	Revision	Status
GB/T 43642-2024	Technical specification of forensic personal identification	current edition	Current

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