The primary function of the Investigations Division (Detective Bureau) is to conduct the follow-up investigation after a crime has been reported. The goal is to identify the perpetrators of the crime to assist the District Attorney's Office in the successful prosecution of the suspect(s). The Records Unit is also part of the Investigations Division.

The Investigations Division also provides support to victims of crimes during the course of an investigation. The crime victims and the community both benefit from the prosecution and punishment of criminals.

Many investigations can be completed in a matter of weeks, whereas other investigations may take years before they are solved.

Every attempt is made to prioritize their work so that cases involving injured persons, threat to personal safety or significant property loss receive the most immediate attention.