The Detective Bureau is the investigative arm of the Police Department. Detectives assigned to the Bureau are responsible for the follow-up investigation of felony and misdemeanor offenses reported to the Department. These investigations consist of interviewing suspects, victims, and witnesses; analyzing information for validity, reliability, and accuracy; and compiling a comprehensive and factual case file to be presented in court. Successful follow-up investigations are then forwarded to the Connecticut State’s Attorneys' offices for prosecution.

The Detective Bureau is commanded by Lieutenant Jillian Cabana, who supervises six detectives, one sergeant school security supervisor, one school resource officer (SRO), four school security officers (SSO), and one officer assigned to the Regional Auto Theft Task Force. The Detective Bureau is assigned several hundred cases for follow-up investigation annually. The general working hours of the Detective Division are Monday through Friday, 9:00 a.m. to 5:00 p.m.   

The Detective Bureau is the point of contact for all local pistol permit applications and fingerprinting services.