forensic:a chain from crime scene to crime scene ou méfaits divers

Chain of custody - The method used to keep track of who is handling a piece of evidence, and for what purpose, and is of paramount importance to any investigation; it is the unbroken sequence of events that is caused by an item of evidence from the time it is found at the crime scene to the time it appears in court. Every link in this chain is documented -- from the discovery at the crime scene, through evidence gathering, storage, lab analysis, return to storage, and transfer to court. Every link is documented by date, time, handling individual, and what was done with evidence by that individual. If chain of custody is broken, if the evidence cannot be accounted for in even one step of its journey from crime scene to courtroom, it is rendered inadmissable and useless to the case