The responsibility of the Investigation Division is to conduct follow-up investigations of all reported felony offenses and certain misdemeanor offenses that occur in the unincorporated areas of Contra Costa County.

Detectives also follow-up on the same crime types committed in the contract cities and special districts. Detectives are dedicated to efficient, timely and thorough criminal investigations to determine facts as they relate to the innocence or guilt of those suspected of criminal activity.

The objectives of such investigations are the identification and prosecution of those individuals responsible for the crime. The recovery of stolen property is also a priority. The Division is divided into six basic areas of responsibility:
  • Crimes Specific Unit
  • Sexual Assault Unit
  • Persons Crime Unit
  • Domestic Violence
  • Property Crimes Unit
  • Fraud / Hi-Tech
  • Special Investigations Unit
  • Vice
  • Narcotics
  • Misdemeanor Complaints
  • Crime Stoppers of West Contra Costa County (For West Contra Costa County only)