Investigations Division is made up of Texas Peace Officers who are responsible for law enforcement activities in support of criminal cases being prosecuted by the District Attorney's Office.

These activities may include follow-up of criminal cases filed by other Denton County law enforcement agencies, tracking witnesses, and ensuring that all witnesses and evidence required to prosecute cases are present when required in court.

Investigators also perform traditional law-enforcement activities including original investigation of offenses at the direction of the District Attorney, arrests of suspects, interview and interrogation of witnesses, and participation in various County, State and Federal Task Forces targeting offenders.

There are 21 Criminal Investigators employed by the District Attorney's Office (see our assigned personnel). They are assigned a wide variety of duties, including casework in a number of specialized areas of criminal law. 

Assigned Personnel | Employment Requirements | Denton County Sheriff and Other Area Law Enforcement Links

Employment Requirements:

The minimum requirement to be an Investigator with this office is to be CURRENTLY certified as a Regular Peace Officer by the Texas Commission on Law Enforcement Officers Standards and Education (TCLEOSE). A wide background in police work with strong emphasis on investigations, certification at the "Advanced" or "Master" peace officer level, and college is strongly preferred. An investigator position in this office is not an "entry level" position in Law Enforcement. Please see our Employment Information page for current openings and further information.

Assigned Personnel:

(All Personnel Can Be Reached At (940) 349-2600,or Click Name For E-Mail, or Click "Vacant" Positions for Official Denton County Job Posting)

  • Joe Erwin
    Investigative Supervisor
    (Misdemeanor Trial Division)
    (940) 349-2618
  • Casey Finke
    Investigative Supervisor
    (Family Law Division)
    (940) 349-2666
  • Mike Sparby
    Investigative Supervisor
    (Felony Trial Division)
    (940) 349-2705
  • Brian Wolfe
    Financial Crimes Investigator
    (940) 349-2725


Assigned Personnel | Employment Requirements | Denton County Sheriff and Other Area Law Enforcement Links