A six year-old girl was subjected to “depraved” sexual abuse by her mother, stepfather and two other men at the same time, carried out after she was plied with meth – and which was sickeningly caught on camera.

Tracey Coulter, 51, was today jailed for 21 years for his role in the abuse – one of the highest jail terms ever handed to a paedophile in Western Australia.

And the extent of the horrifying attacks can be detailed, after a judge ruled a suppression order on identifying Coulter could be lifted following a lengthy police investigation.

WA’s District Court was told that Coulter and the parents of the girl had met as “swingers”, and abused the girl persistently in company with one another.

Coulter admitted that between 2012 and 2013 – when the girl was aged 6 and 7 – he was one of up to four adults who abused the girl at the same time.

Prosecutor Carmel Barbagallo had previously outlined how the group would shower, show the girl child porn and then encourage to smoke a pipe, believed to contain meth.

In between the abuse, the group would eat snacks in between the sex acts. On occasion, the girl was also made to record some of the abuse.

The horrifying scenario, which involved acts done to the girl and between the adults in her presence, occurred three times – the last of which was on the girl’s seventh birthday.

On that occasion, the girl’s stepfather was said to have told her the gathering was a “birthday surprise”.

In 2014, when the girl was eight, more group abuse took place and was filmed.

Somehow, a USB stick containing recordings of the abuse was disseminated, and found by a member of the public in the garage of a short stay rental property in the western suburbs.

That recording was handed to the police, who began an investigation.

Judge Bruce Goetze today said the case was amongst the worst child sex crimes a WA court had seen, referencing the father of the victim of the Evil 8 as he did so.

“This was depraved and perverted conducted inflicted on a young child … (you behaved out of a) perverted and warped sense of desire and carnal lust,” Judge Goetze said.

“It was indefensible, depraved and despicable conduct.”

Coulter was jailed for a total of 21 years, meaning he will have to serve 19 years before he is eligible for parole.