Have you ever wondered how evidence is submitted and processed by the Federal Bureau of Investigation. This link will take you to the current (2007) Handbook of Forensic Services. This is the guide published by the FBI for state and local law enforcement agencies. It is a compilation of their policies and guidelines for submitting evidence. It can be pretty dry reading but you may find some of the information useful. If nothing else, it may give you some insight as to the types of evidence handled by the FBI laboratory.