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Crime Scene Investigations


The mission of the Crime Scene and Property Unit is to respond to crime scenes/critical incidents to document and process them for a variety of different types of evidence.  Processing and documenting includes, but is not limited to: forensic photography, videography, scene scans, swab sampling, video surveillance retrieval, written reports, and the collection of physical evidence.  They work closely with the San Joaquin County District Attorney's Office during the criminal prosecution process, including providing them with discovery materials for the trial and testifying the court.

The Unit is also responsible for maintaining the integrity of evidence and property, by packaging, preserving, securely storing, and tracking all evidence and property which is collected by members of the department

The Crime Scene and Property Unit is staffed with four Crime Scene Technicians, one Property and Evidence Technician, and one supervisor who reports to the Bureau of Investigations Lieutenant.  There is currently one vacancy for a Crime Scene Technician.

Crime Scene Unit personnel have received extensive training relating to crime scene investigations and property and evidence management.  They are also members of California State Division of the International Association of Identification (CSDIAI) and the California Association of Property and Evidence (CAPE).

In 2019 Unit members performed 547 investigations and collected and processed a total of 8,944 individual items of evidence.  A Total of 52 identifications were made through latent print evidence.  They also completed 564 discovery requests for the District Attorney's Office.

Crime Scene Unit members are also responsible for the release and disposal of evidence and property once a criminal case has been adjudicated.  This involves continuous research of cases through the court system.  Evidence and Property must be properly disposed of in accordance with local, state and federal laws.  This process includes returning the property to the legal owner, destroying by burning at a federally approved incineration facility, sending to public auction, or donating to specific organizations authorized by law.

In 2019, the Unit incinerated 1009 lbs. of firearms and other contraband evidence, and 2,015 lbs. of illegal narcotics and controlled substances.  The new Evidence Facility (the North Annex) also opened.  The nearly 16,800 square foot facility is outfitted with evidence lockers, 3 large evidence vaults, a drying room, a property release room, ample space for evidence vehicles/processing, and a car lift.

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