The chain of custody is a documentation of those in custody of evidence. As always evidence from a crime scene must be used in the court of law to prove the reason on why the suspected party was actually the cause of the crime. To make sure the evidence is valid without the evidence being stolen, destroyed, tampered or contaminated with all those who are in possession of the evidence must put their signature, initials and date on the evidence or evidence packaging. When evidence is found it is given to forensic scientists who analyze the evidence and the forensic scientists go through the same documentation when in possession of the evidence. When the analyzation process is finished the forensic scientists hand it over to police officers for storage who also go through the documentation process. The evidence is only taken out when the evidence is needed for the court of law or when further analyzation of the evidence is needed.