Glossary / Evidence & Recording / Chain of custody Chain of custody The documentation tracking who held and handled a piece of evidence from collection onward. A gap in the chain is one of the standard ways evidence gets challenged.
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Every term here is one that comes up in the United States, in the footage covered in the Atlas Ioka videos , explained as it is used on police radio, in reports and on camera. This is not legal advice and not a statement of law in any particular place: radio codes, offense definitions, testing procedure and evidentiary rules all vary between agencies and between states, so treat each entry as a starting point rather than an authority.
