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1.1 This practice describes procedures and techniques for a forensic science laboratory to protect and document the integrity of items of physical evidence with respect to suitability for scientific testing, and admissibility as evidence in litigation.

1.2 This practice recommends generally accepted professional principles and operations, although the facts and issues of each situation require consideration, and frequently involve matters not expressly dealt with herein. Deviations from this practice should be based on specific articulable circumstances.

1.3 This practice offers a set of instructions for performing one or more specific operations. This standard cannot replace knowledge, skill or ability acquired through appropriate education, training, and experience and should be used in conjunction with sound professional judgment.

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 and health 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.

3.1 Prior to being presented in court, a foundation must be established showing how evidence was collected, who collected the evidence, where it was collected, who has had custody of the evidence, how the evidence has been processed, and when changes of custody have occurred.

3.2 Following the procedures outlined in this practice can serve to protect the chain of custody of the evidence while the evidence is at the forensic laboratory. Refer to Practice E1188 for chain of custody information and procedures prior to submission to the laboratory.