The Criminal Investigation Division is headed by a Lieutenant. The CID is comprised of several specialties including investigating and reporting criminal offenses, narcotics investigations and gathering and preserving evidence for presentation at trial. The personnel in this division are considered either criminal investigators or crime scene investigators. Criminal investigators attempt to learn and report all the pertinent facts relating to criminal cases, while crime scene investigators collect, analyze and preserve evidence related to the crimes. Some investigators have primary responsibility in a specialized field, such as forgery or sexual assault, but are not confined to their specialty and often work as a team member to assist in major crimes. The three units within the CID are: Crime Scene Investigations, Major Crime Investigations and the Special Investigative Unit, each led by a Sergeant who answers to the CID lieutenant.
Like all law enforcement divisions in the Sheriff's Office, the CID plays a support role to the Patrol Divison They assume the responsibility for involved investigations which the Patrol Division does not have the time to investigate.