Twin brothers and sworn police officers in a small town in the San Luis Valley face theft charges, the Colorado Bureau of Investigation announced Friday.

Center Police Chief Aaron Fresquez and his brother, Sgt. Adam Fresquez, operated a private K-9 training business while on-duty using town resources. The two men, 35, allegedly trained K-9 dogs for other police agencies and kept training proceeds that should have gone to the town of Center.

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Both were issued summons, while Aaron Fresquez was also cited with a misdemeanor count of official misconduct, CBI said in its news release.

The charges follow a year-long investigation by the CBI at the request of the 12th Judicial District Attorney. The 12th Judicial District Attorney’s Office has requested the 6th Judicial District Attorney’s Office act as special prosecutors to avoid conflict of interest.

Both men are scheduled to appear in 12th Judicial District Court at an unannounced date.

The town of Center has placed the brothers on administrative leave. In the meantime, the city has appointed Lt. Eidy Guaderama to the position of interim chief.