【国外标准】 Standard Practice for Examining and Preparing Items That Are or May Become Involved in Criminal or Civil Litigation

4.1 This practice establishes procedures to be followed by the forensic science practitioner to document the nature, state, or condition of items of evidence. It also describes specific actions that are required for destructive testing if planned testing, examination, disassembly, or other actions are likely to alter the nature, state, or condition of the evidence so as to preclude or adversely limit additional examination or testing.4.2 Deviations from this practice are not necessarily wrong or inferior, but such deviations should be justified and documented.1.1 This practice covers procedures for the examination and testing of evidence items or systems that may have been involved in a specific incident which are, or may be reasonably expected to be, the subject of civil or criminal litigation.1.2 This practice is applicable when it is determined that examination or testing of evidence is required, and such examination is likely to change the nature, state, or condition of the evidence.1.3 This practice is intended for use by competent forensic science practitioners with the requisite formal education, discipline-specific training (see Practice E2917), and demonstrated proficiency to perform forensic casework.1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.