Chain of custody needs to be kept intact for which of the following reasons?

Data preservation during inspection is addressed by forensic imaging and write-blocking techniques, not by chain of custody documentation itself.

Ensuring evidence is not left at the scene is a collection responsibility handled during the initial evidence gathering phase, separate from the ongoing chain of custody process.

Chain of custody is a chronological record documenting every person who collected, handled, transferred, or analyzed a piece of evidence. Courts require this documentation to verify that evidence has not been tampered with or contaminated between the time of collection and presentation at trial. Without an unbroken, documented chain of custody, a judge may rule the evidence inadmissible, undermining the entire legal case.

Returning evidence to its owner is a post-case property management step that is unrelated to the legal purpose chain of custody serves during an investigation and trial.