Final answer:
Clearly marking evidence and maintaining a chain-of-custody are important to establish the authenticity and integrity of the evidence and create a clear record of its custody and control.
Step-by-step explanation:
Clearly marking evidence and maintaining a chain-of-custody are important for several reasons. First, it helps establish the authenticity and integrity of the evidence, ensuring that it has not been tampered with or contaminated. This is crucial for legal proceedings where the evidence needs to be reliable and admissible in court.
Second, maintaining a chain-of-custody documents the custody, control, and transfer of the evidence, creating a clear record of who had access to it at all times. This is important to establish the evidentiary trail and prevent any doubts about the integrity of the evidence.