Bert Lopez, a decorated 8-year veteran of the state police officer was canned late last week after surveillance photos of his frisky encounter with an unidentified woman at a remote Santa Fe ranch became national news.
Lopez has 30 days to appeal his firing, police said. He has not commented on the matter.
State police didn't say whether Lopez was on duty at the time.
But in two photos from the incident, the horny lawman is dressed in full uniform, standing between the legs of a woman lying on the hood of the black sedan.
The firing came days after Santa Fe county police officials said they wouldn't charge Lopez with a crime because the two were not in public view.
It appears the only witness to the rendezvous was a tiny Chihuahua, who can be seen standing behind Lopez in one of the photos.
"It is an embarrassing situation for the department, but we have to remember the rights of the employee afford him due process we must follow so we won't be commenting further," state police spokesman Sgt. Tim Johnson told the Santa Fe New Mexican.
The surveillance photos were taken by a motion-triggered security camera at the front gate of the county-owned La Bajada Ranch, south of Santa Fe.
Earlier this month, a county employee found the photos and sent them to the Santa Fe County sheriff, who sent them along to the state police.
State police identified the cop in the photos as Lopez and he was put on leave for three weeks.
It's not clear when the photos were taken, but Santa Fe Sheriff Robert Garcia said he believes the encounter was in late July or early August.
Police officials didn't release any details about the woman or her relationship with Lopez, but they said the sexual encounter wasn't a favor-swapping deal related to his position as a cop.
Lopez was named Officer of the Year in his district in 2009 and was given a special award in July for going above and beyond the call of duty, the New Mexican reported.
He also busted a well-known ex-con in May who later escaped jail while officers were filling out paperwork.
The suspect allegedly kidnapped and raped a woman before he was recaptured, police said.