Monster policeman Wayne Couzens showed off a prostitute to his Met colleagues at a hotel party, calling her his 'bit of brass'.
The murderer, 48, invited the sex worker to his colleague's tenth wedding anniversary party, despite being married.
The killer, who was jailed for life this week for the abduction, rape and murder of Sarah Everard, 33, also once had a prostitute arrive at his station demanding money.
Couzens was out on patrol and was called back to the station by his sheepish colleagues and escorted her to a cashpoint.
A source told The Sun: 'When he came back from the ATM he said she was Eastern European and that he couldn't be messing around with her or the people looking after her.'
Monster policeman Wayne Couzens showed off a prostitute to his Met colleagues at a hotel party, calling her his 'bit of brass'
Meanwhile a witness at the hotel party said: 'We knew Wayne was married and expected him to turn up with his wife. Instead jaws dropped when he showed up with this woman dressed really over the top.
'He was quite open about her being an escort. He said "My wife can't make it so I've brought this brass with me."'
The source said they saw Couzens in the toilets who was laughing about having to pay for sex, adding: 'He gave me the creeps and I wasn't the only one.'
The monster was known among his fellow officers to have arranged meet-ups with call girls in local pubs.
He was nicknamed 'The Rapist' by colleagues and was once reported for slapping a female officer's bottom at Bromley station, but no action was taken.
There were also reports that he drove around Kent naked from the waist down in 2015.
And three days before kidnapping Sarah, he allegedly flashed a McDonald's worker.
The killer, who was jailed for life this week for the abduction, rape and murder of Sarah Everard, 33, also once had a prostitute arrive at his station demanding money
It had been known that Couzens' car was reported by staff at a McDonald's restaurant in Swanley, Kent, after two female workers said they had been flashed by a motorist there on February 7 and again on February 27. The complaint was made on February 28.
But last night it emerged the CCTV evidence showing his number plate had actually brought up Couzens' name as a suspect on Met police systems.
Yesterday a McDonald's worker who was flashed by the sexual predator blasted officers for 'not acting quickly enough'.
The worker, who did not want to be named, said: 'The police took our statements and took away CCTV. If they had taken this more seriously, they could easily have figured out that he was a policeman who had committed these crimes.
'The police had three days to stop him but didn't. It could have stopped him from doing a lot worse.'
It comes as it was revealed that Couzens was deployed to guard MPs at the House of Commons on multiple occasions before he raped and murdered Miss Everard.
The armed police officer, 48, performed duties in the Houses of Parliament at least five times
