 The primary responsibility of the crime scene unit is to assist detectives with a response to and processing of approximately 5,000 crime scenes each year. Crime scenes include everything from burglaries, auto theft and aggravated assaults to more complex scenes like homicides, sex assaults and officer-involved shootings. Processing crime scenes involves crime scene management, documentation including photography and video and the identification, collection and preservation of evidence. Depending on the type of crime scene, several different specialized processing techniques can be used. These include shooting reconstruction and bullet trajectory, bloodstained pattern analysis, DNA and trace evidence collection and latent fingerprint processing. The crime scene unit utilizes a 35-foot mobile crime scene command center of major scenes to help facilitate staging and processing. In the forensic garage at the Denver Police Crime Lab, there are three separate vehicle processing bays. One of the bays features a hydraulic lift used to search for evidence on the underside of vehicles. Another bay is equipped with a cyanoacrylate or superglue fuming chamber. This allows investigators to fume an entire vehicle at once, then locate, recover and submit latent fingerprints for analysis. A full complement of pneumatic tools is also available in the forensic garage. These are used to disassemble vehicles and recover evidence. In 2013, the crime scene unit began a change from sworn police officers to civilian personnel. Today, the entire unit is staffed by civilians.