MISSOULA, Mont. -

The Missoula County Sheriff fired a detention officer Tuesday after he was accused of videotaping a mother and her two children changing in a locker room at a local waterpark over the weekend.

The firing came after prosecutors filed two felony charges against 37-year-old Missoula jailer Michael Gauci Tuesday afternoon.

The department announced in a press release that “Mr. Gauci's off duty conduct violated Missoula County policy, as well as the detention officer’s code of ethics."

"We're disappointed, obviously,” said Missoula County Detective Jason Johnson. “It's very unfortunate, especially when it happens with somebody who works at the department, but we're a very big department, people make really bad choices."

Witnesses said they spotted Gauci last Saturday holding a video camera over a changing stall at Splash Montana.

A woman in the stall spotted Gauci and cried out for security, and bystanders reportedly grabbed Gauci and held him until police arrived, and accused him of trying to delete his video.

Gauci's faces felony charges of burglary and trying to tamper with evidence.

Court documents said Gauci admitted to investigators he'd done the same thing before.