The Criminal Investigations Unit falls under the Support Services Division and is the investigations arm of the police department. They perform all criminal investigations and work closely with federal, state, and local law enforcement agencies as well as the Denton County District Attorney's Office to prosecute criminal cases. The Criminal Investigations Unit includes 1 Sergeant, 2 Detectives, and the School Resource Officer.

The Criminal Investigations Unit is commanded by Sergeant B.K. Hall, who can be reached at (940) 497-2228, Ext. 204 for questions or assistance.