The Detective Bureau is responsible for conducting investigations of crimes and incidents initially investigated by the Patrol Division. After crimes have been committed against persons or property, detectives begin their investigations. In most cases, this process begins with the detective evaluating the credibility of the people involved as well as collecting and examining any evidence. Although each case has one detective assigned as the primary investigator, success is often the result of a collaborative effort. In addition to criminal investigations, the detectives are responsible for conducting police officer and civilian employee applicant background checks. The Detective Bureau also conducts all investigations for Firearms Applications, Liquor Licensing, and Sex Offender Registrations.