Detectives in CID conduct follow up investigations including interviews of victims, witnesses, and suspects. Once their investigations are complete, warrant requests are completed and forwarded to the prosecutor's office or city attorney. Detectives are then in charge of cases to their conclusion in the court system. The departments property room is managed by CID.
One of the detectives investigates crimes involving juvenile suspects. This detective also works with Fraser Public Schools to handle all complaints in the schools.
Liquor license background investigations are completed in this division when businesses are requesting licensing through the Michigan Liquor Control Commission.