Criminal Investigations

The Criminal Investigations Division is under the command of Lieutenant David Valliant. The Criminal Investigations Division is responsible for investigating criminal offenses that have occurred within the city limits of Rockwall. CID is composed of the Criminal Investigations Unit, Narcotics Unit, Deployment Unit, Crime Scene Unit, and Warrant Unit. For more information, contact Lieutenant Bryan Garrett at (972) 772-6462 or by email at

The Criminal Investigations Unit is responsible for the detection and investigation of crimes against persons, juvenile crimes, property crimes and financial crimes.

Currently there are six detectives assigned to the Criminal Investigations Unit. Four of these detectives are assigned to investigate adult crimes, one detective specializes in juvenile offenses and another specializes in family violence offenses. These detectives are under the direct supervision of a Sergeant.

All of the detectives in the Criminal Investigations Unit are cross-trained and are capable of investigating different offenses.


The Crime Scene Unit was formed in 2008 and is made up of six officers and one detective. Officers volunteer to partake in this assignment on top of their normal duties. Members of the Crime Scene Unit are available to assist 24 hours a day, seven days a week. The Crime Scene Unit is responsible for assisting in criminal investigations by effectively documenting, collecting and analyzing photographs, latent prints and other physical evidence present at crime scenes and other locations. They also help recognize, handle, preserve, and package physical evidence.

Members of the Crime Scene Unit receive advanced forensic training from state and federal agencies in forensic disciplines which include crime scene reconstruction, photography, fingerprinting, biological evidence preservation and collection, crime scene diagramming and the use of alternate light source technology.


The Rockwall Police Department Narcotics Unit is a proactive unit that aggressively works with local, state and federal agencies in an effort to reduce the distribution and possession of narcotics in our community. Narcotics Unit Investigators are responsible for investigating cases involving all drug related issues including the sale, possession and manufacturing of illegal drugs. The unit is staffed with a Sergeant and three detectives.


If you would like to report drug related information please contact the Rockwall Police Department at (972) 771-7717 or Rockwall County Crime Stoppers at (972) 771-8477. You may also forward any narcotics related information or questions via email.

The Criminal Investigations Division Deployment Unit is a covert surveillance and apprehension team, which is comprised of a sergeant and three officers.

The Deployment Units was formed for the purpose of combating property crime by taking proactive steps to locate, identify and arrest repeat or habitual offenders. The Unit will actively search for offenders named in arrest warrants that have been filed on by the Investigative Units. They will conduct surveillance of those individuals who are suspected of committing crime and/or specific offense locations with the goal of arresting individual’s in-the-act. The Units will assist the Patrol Officer/Investigator in any way possible to combat crime problems and or respond to in progress incidents that require surveillance to assist in the apprehension of offenders. The Deployment Unit will work closely with other divisions and crime analysts to obtain distribute and act on information and intelligence.


The Rockwall Police Department now offers the general public a prescription drug return program through the use of a drug collection unit that was provided by CVS Pharmacy. The drug collection unit will provide the general public with a safe and environmentally responsible way to dispose of unwanted or expired medications, including controlled substances. The unit is located outside of the Communications Center entrance of the Rockwall Police Department, which is located at 205 West Rusk Street. The drug collection unit is available 24 hours a day, 7 days a week and it is monitored by video surveillance. Unwanted medications can be dropped into the drug collection unit with no questions asked. This service is available to the general public and should not be utilized as prescription drop off for doctors or dentists offices. In addition, liquids, needles, thermometers, medical waste and trash should not be placed in the unit. .