Chain of custody documents are vital in incident response to establish that evidence has been controlled and handled properly from the time of acquisition to its presentation in a legal setting. Maintaining chain of custody ensures that the evidence is trustworthy and has not been tampered with, which is essential for its admissibility in court. Forensic image hashes ensure data integrity but do not by themselves provide information on the handling of evidence. Witness statements are useful but can be less reliable than physical evidence with a proper chain of custody. Log files are important pieces of evidence, but without a proper chain of custody, their integrity and admissibility can be questioned.