Working knowledge of the criminal justice process; federal, state, and city rules, regulations, procedures, and judicial rulings related to evidence, searches, seizures, arrests, and police-citizen encounters; investigative processes and interrogation techniques; crime scene processing and surveillance techniques; social service agencies and community resources and their use and applicability to investigative processes; courtroom testimony procedures; departmental rules, regulations and procedures; crime prevention techniques, principles, and practices; underlying causes of criminal behavior; safe and effective arrest techniques; basic first aid and CPR; dispute resolution techniques; computer applications and software used in spreadsheets and word processing. Individuals will be subjected to evidence of violence or trauma, including graphic and disturbing scenes of homicide, sexual assault, robbery, traffic accidents, abuse, arson, autopsy subjects (deceased persons, children and animals), and related evidence at all stages during the investigation and prosecution of crimes.