Criminal Investigations Unit

Press Enter to show all options, press Tab go to next option

The Criminal Investigations Unit is comprised of three areas:

  • Crimes against Persons
    • Sgt. John Spreitzer 970-962-2215
  • Crimes against Property
    • Sgt. Aaron Belk 970-962-2230
  • Special Investigations

command vehicleCriminal Investigations is housed at Police Headquarters and has jurisdiction over all crimes against persons or property. If you need the Unit manager, please contact Lt. Rick Arnold at 970-962-2680.

If you have an investigative lead or tip, we have a "tip-line" to leave information at (970)962-2032.
The Special Investigations Unit (SIU) is housed at an off-site facility and investigates narcotics and vice violations. SIU is also a component of the Northern Colorado Drug Task Force, a multi-jurisdictional task force.

To relay information regarding drugs or other vice issues to the SIU, please call (970)962-2678. 

For questions or information regarding meth labs/houses, please contact the Larimer County Environmental Health department at 970-498-6793 or email