Chain of Custody and Legal Admissibility

Chain of custody is the chronological documentation that tracks the collection, transfer, storage, and analysis of evidence from the moment it is discovered until it is presented in court or archived. It answers: who collected the evidence, when, from where, how it was handled, who had access to it, and where it has been stored. An unbroken chain of custody demonstrates that evidence was not tampered with or altered after collection, which is essential for its legal admissibility.

Every piece of evidence requires its own chain of custody form that is completed at each transfer. Required fields include: unique evidence identifier, description of the evidence item, case number, date and time of collection, name and contact information of the collector, location where the evidence was collected, cryptographic hash values, signature of every person who receives or transfers the evidence, and secure storage location. Gaps or inconsistencies in the form weaken the legal case.