Forensic evidence collection, preservation, and fingerprint identification in criminal investigation

Criminal Justice - Forensics

Collection and Preservation of Physical Evidence

The physical evidence collector has the responsibility to collect, package, mark and preserve any evidence on the scene. There are many types and classifications of physical evidence. There are even specialties in forensic science relating to physical evidence. Certain crimes are coordinated with specific kinds of physical evidence and the recognition, collection and preserving of the forensic evidence is crucial to discovery and administering justice. Physical evidence must be collected and preserved by the first investigator on the scene. The preservation procedures allow for later physical evidence use in field tests or enhancement reagents.

First Officer on the Scene and His or Her Responsibilities

The first officer dispatched to the scene of a crime has grave responsibilities. Before arriving, he or she should call the dispatch and tell the estimated time of arrival. They must assesses their own health and safety risks, what materials and/or backup they will need, assess the health and safety needs of other persons and other officers on the scene and administer CPR or First Aid, if necessary. They should establish contact with emergency services and see if officials have determined at what stage the incident is in. They prepare a holding statement for the media if necessary. They must record everything they survey and assess. They assume interim control of investigation. They should take photos of the scene. Following investigation, they then contact all necessary officials and make a report.