A staff sergeant in the United States Air Force was arrested for four sexual assaults, according to the Colorado Springs Police Department.

Desmond Alvis Martin, 29, was taken into custody at the Criminal Justice Center in Colorado Springs on Feb. 15. Martin was arrested for three sexual assaults that occurred in Colorado Springs in 2015 and one sexual assault in Aurora in 2016, according to the Colorado Springs Police Department.

A spokeswoman for Peterson Air Force base said Martin has been stationed at Peterson as a military working dog handler since 2013. She said he had previously been stationed in Ramstein, Germany and Osan, Korea.

According to Mike Dickerson, a spokesman at Air Force Personnel Center at Randolph Air Force Base, Martin has won at least one award, an Air Force achievement medal, issued in February of 2011.

Dickerson said Martin began with the Air Force in January, 2008.

The sexual assaults were discovered by a joint investigation by the Colorado Springs Police Department's Special Victims Section, the Aurora Police Department's Sex Crimes Unit, the Denver Police Department's Sex Crimes Unit and the United States Air Force Office of Special Investigations.