Responsibilities also include, but are not limited to: performing examinations of ammunition, spent bullets and casings, and the determination and recording of their physical parameters using measuring projectors, micrometers and other equipment; performing examinations of firearms, bullets, shells, casings and other weapons; conducting comparison examinations regarding spent projectiles, spent cartridge casings and shot shells; performing examinations on clothing, bedding and other surfaces for the presence of gunshot residues or powder patterns for distance determinations; conducting research, method development and validation of new technical procedures; performing chemical restoration of obliterated serial numbers and other markings on weapons; performing photography using digital photographic equipment; taking notes and generating reports; testifying to findings in court; and assisting with quality assurance duties of the section. Candidates will be subjected to a criminal history background check prior to permanent appointment.