Why is it crucial that no unauthorized person has access to the evidence?

Maintaining the integrity of the evidence is essential because it ensures that the evidence remains untampered and valid throughout the investigation and any subsequent legal proceedings. If unauthorized individuals have access to the evidence, there is a risk that it could be altered, contaminated, or otherwise compromised. This compromise could lead to question the reliability of the evidence in court, potentially resulting in wrongful conclusions or verdicts. Ensuring that only authorized personnel handle the evidence protects its authenticity and helps uphold the justice system.