Which of the following is the MOST important step for preserving evidence during forensic procedures?

Involving law enforcement may be appropriate depending on the incident but does not itself preserve the integrity of the evidence.

Chain of custody establishes a chronological and legally defensible record of every person who had possession of or access to the evidence from the moment of collection through analysis and potential court presentation. Without a proper chain of custody, evidence can be challenged or deemed inadmissible because there is no way to prove it was not tampered with or substituted. It is the foundation of forensic soundness in both criminal and civil proceedings.

Recording the time of an incident is useful context but does not ensure the evidence itself remains unaltered or legally valid.

Reporting within one hour is a best practice for incident response timelines but has no direct bearing on evidence preservation integrity.