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Investigations Bureau

Investigations Bureau

Capt. Derek Williams

Derek Williams

Captain Derek Williams is the Investigations Bureau Commander. Captain Derek Williams began his law enforcement career in 1991 with the Ontario Police Department. Before becoming a police officer, he was honorably discharged from the United States Air Force.

Captain Williams has an Associates Degree from San Bernardino Valley College and a Bachelors Degree from California Baptist University.

After graduating from the 103rd class of the San Bernardino County Sheriff's Academy, Captain Williams worked as a Patrol Officer. He was later selected to start the Bicycle Program at the Ontario Police Department.

During his career, Captain Williams worked many assignments; he was assigned to Narcotics as an Officer and Detective, assigned to the Ontario Mills mall, worked as a Field Training Officer, was a member of the department's SWAT Team, and supervised the Personnel and Training Division. Before being promoted to Captain, he was the West Area Commander.

In December 2010, Captain Williams graduated from the Los Angeles Police Department Leadership Program, formally known as The West Point Leadership Program.


Our Bureau contains the Detective Unit, the Narcotics Unit, the Gang Unit, the Crime Scene Unit and the Evidence Unit. Our Detectives have promoted through the ranks of Officer and Corporal to become well trained and very experienced investigators. The Lieutenant and Sergeants that supervise the Investigations Bureau are all former Detectives. The Professional Staff assigned to assist the Detective Unit receive specialized training. Our Detectives carry a wide variety of caseloads. A Detective may have expertise in homicide, burglary, fraud, identity theft, sexual assaults, vehicle theft, narcotics violations and other offenses. The Detectives in the Unit have been assigned to Area Command districts. They are responsive to geographic areas of the City and are familiar with crime trends specific to their particular district.

Our Narcotics Unit works with other Department Units, other local Law Enforcement Units, California State Law Enforcement agencies and Federal Law Enforcement agencies. The Narcotic Unit serves to help our citizens maintain the quality of life in their neighborhood, and the Unit serves to thwart the efforts of major drug traffickers.

Our Gang Unit members are experts in investigating the activities of persons that conduct criminal activity in groups. They work with other Departmental Units, Local agencies, Federal agencies and State agencies to curtail the violent activities often associated with gang members.

Our Crime Scene Unit works with all other Units and Divisions within the Department. The technicians in the Unit are highly trained and experienced forensic specialist. The technicians have the technology, equipment and training to discover and process evidence for all of the criminal cases filed for prosecution.

Our Evidence Unit takes in all manner of physical goods into professional and organized custody. The Unit maintains all evidence in the preparation for adjudication.

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