Criminal Investigations Division

Captain Rickey Doerre graduated from the Captain Clint Peoples Regional Police Academy in Conroe Texas in 1989, and immediately began his career in law enforcement with the Montgomery County Sheriff’s Department. In 1994, after serving nearly five years with the Montgomery County Sheriff’s Department, Captain Doerre became a member of the Tomball Police Department and was assigned to the Patrol Division.


In 1997, Captain Doerre was promoted to the rank of Corporal, serving as a supervisor within the Patrol Division. He was later promoted to Sergeant in 1999 and assigned to the Tomball Independent School District as a D.A.R.E. (Drug Abuse Resistance Education) instructor and student resource officer.


In 2003, after serving five years as a student resource officer with the Tomball Independent School District, Captain Doerre transitioned back into the patrol division, and  assume the duties and responsibilities of police instructor. Later in 2003, he was promoted to the rank of Captain, assuming Command of the Patrol Division. In 2007, Captain Doerre transitioned from the patrol division to the investigative division of the police department assuming command of the Criminal Investigations Division.  

Captain Rickey Doerre is a graduate of Tomball High School; he received his Bachelor’s Degree from Midwestern State University in Applied Arts and Science. He holds a Masters Peace Officers Certificate from the Texas Commission on Law Enforcement Standards and Education; is a Certified Police and Firearms Instructor; and Advanced Accident Investigator.


Captain Doerre is also a graduate of the F.B.I. National Academy - 219th Session, and Leadership North Houston Class #7.



The Investigations Division is responsible for the follow-up investigations of most criminal offenses and other support function of the department. This division is organized into the Investigations Unit, the Communications and Records unit, the Information Systems Unit, and Investigative Services Unit (property / evidence) Personnel, training, and the Criminal Intelligence function.

Investigations Unit Tasks

  • Follow- up on cases not initially cleared by patrol division
  • Recognize and document patterns of crime
  • Conduct surveillance
  • Coordinate with and assist other agencies
  • Gather and disseminate criminal intelligence to other divisions and agencies
  • Interview suspects, witnesses, victims, and arrested persons.
  • Initiate narcotics cases
  • Work with all confidential informants
  • Conduct undercover and special operations
  • Maintain all records and interview listed sexual offenders residing in Tomball
  • Complete all background investigations on new applicants to the Tomball Police Department.

Property & Evidence Tasks

  • Preserve and maintain all evidence 
  • Package, record and store evidence for court and/or future use 
  • Submit items to the Harris County Medical Examiner’s Office: evidence, narcotics, bodily fluids, etc. 
  • Maintain chain of custody and a high level of security with all evidence storage procedures 

Crime Scene Investigations

  • Process major crime scenes
  • Collect, preserve and develop all evidence
  • Assist in the identification, apprehension, and prosecution of suspects

Internal affairs

  • Thoroughly investigate formal complaints assigned by the Chief of Police


  • Thoroughly investigate formal complaints assigned by the Chief of Police
  • Determine the validity of complaints filed against department members