David, retired from the Dallas Police Department, after serving for over 41 years. His experience in the police department included 36 years as a Detective in various assignments.
Those assignments were all as a Detective in Property Crimes, Criminal Intelligence, Public Integrity, Homicide and Robbery. He also served on special assignment for nine years at FBI Dallas, serving on the Violent Crime Squad and Counterterrorism Squad.
David has over 2000 hours of training as a peace officer and also has training from the Reid School of Interrogation, Homicide Investigations, as well as trained by the FBI in Serial Murder Investigations and Counterterrorism.