The Williams Lake, B.C., RCMP officer accused of assaulting a teenage girl last month had been disciplined by the force for disgraceful conduct in the past, a report says.

Const. Andy Yung underwent an internal RCMP investigation in 2008 after he fired his RCMP-issued handgun in his hotel room in a drunken rage, The Ottawa Citizen reports.

Yung is currently under investigation after a complaint from a 17-year-old Williams Lake girl in September.

Jamie Haller said she was punched in the face at least six times after Yung and another officer put her in the back of a patrol car.

The incident was alleged to have occurred after police had been called by a passerby, who reported that Haller was being pursued by members of a native gang in the city, located in the central Interior of B.C.

Haller and her mother identified Yung as the officer who hit her.

The Abbotsford, B.C., police department has been called in as an outside force to investigate the complaint.

The newspaper reports that while Yung was stationed in Alberta three years ago, he had been assigned to provide security at an international meeting of defence ministers at the Banff Springs Hotel.

Disgraceful conduct

Just before the summit got underway, Yung was off duty when he became intoxicated, had an argument with his ex-girlfriend on the phone and then fired his sidearm into the ceiling of his hotel room, the report said.

There were no injuries.

A disciplinary hearing cited Yung for disgraceful conduct, reprimanded him and docked him five days’ pay.

The B.C. Civil Liberties Association, which helped Haller file her assault complaint, said Yung should have been drummed out of the force.

"We hold police officers to a higher standard. It’s a huge trust position," said BCCLA executive director David Eby. "So, if an officer has pled guilty to a criminal offence, we really should be asking whether or not they should remain police officers at all."

Yung was transferred to Williams Lake last April.

With files from the CBC's Eric Rankin