The Criminal Investigation Branch (C.I.B.) of the Kawartha Lakes Police Service is operated under the supervision of the Inspector in charge of Support Services who reports directly to the Chief of Police. The Inspector is also responsible for the supervision of officers assigned to the Forensic Identification Unit, Kawartha Lakes Combined Drug Enforcement Unit, Domestic Violence and the Central East Correctional Centre.

The Criminal Investigation Branch works in conjunction with and provides highly skilled investigative support to the uniform branch. The detectives investigate all types of crime, missing persons, intelligence gathering and any matter of the safety and security of the community. The detectives are responsible for the investigation of all major crime that occurs within the policing jurisdiction of the Kawartha Lakes Police Service.