LAC 41:II.309. Safeguarding Evidence, Generally

A. Drugs, weapons, clothing, and other items related to an alleged offense are physical evidence of crimes. The unit commander must preserve and safeguard any physical evidence in his custody. Physical evidence should be handled by as few persons as possible since anyone who touches it may be required to appear at the trial. In order to properly safeguard physical evidence, it must be carefully marked to insure the later identification. A chain of custody document must be initiated, such as DA Form 4137, Physical evidence should be turned over to investigating officer as soon as possible.