The officer, listening incredulously, bit her tongue to hide her own shock and anguish at the words.

Speaking softly, her account slowly coaxed out by a specialist officer used to dealing with child abuse, the girl told how her father would be in the room with her “calming her down”.

The 13-year-old described the men as “Joe Black”, the “chubby man”, “the massage guy” and another called “David”.

All were abusers she had been made to have sex with by her father, who on most occasions sat nearby and watched or joined in the assaults.

For two years, from the ages of 11 to 13, the girl, who cannot be identified, was pimped out at her home or those of strangers.

This week, in Perth’s District Court, the last of seven men who drugged, degraded, sexually abused and recorded what they did to her, was convicted of those crimes and warned he will face a lengthy term in prison.

They were led by the girl’s father, who was jailed for 22 years after pleading guilty to 61 offences.

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He told police unrepentantly: “To be honest, it was fun while it lasted, but it went way over the line.”

The other men, who pleaded guilty, received sentences ranging from three years to almost 13 years.

The child abuse case, dubbed the ‘Evil Eight’ paedophile ring, has been described as one of Western Australia’s worst.

Judge Bruce Goetze, while sentencing one of her attackers, said: “She’s still a young girl now. She’s yet to mature. As she becomes an adult, when she looks back on what’s happened, she might find that things that she has been able to handle now she can’t handle later.”

It began in January 2013 when Ryan Trevor Clegg, 43, a man who had drifted from job to job and drug to drug since his teens, answered an ad on Craigslist from a “single father with a young daughter” who was looking for “friendship”.

After contact was made, pages and pages of messages flowed between them, each more perverted than the last, before a ‘hook-up’ was arranged at a motel in Scarborough, a coastal suburb of Perth.

Along with Clegg, six more men including a church pastor, a photographer, a sales rep and a handyman made contact, all with the same sick intent.

Throughout 2014, the father encouraged a string of men to have sex with his daughter.

Troy Phillip Milbourne, then 40, met them on a beach in Quinns Rocks, went home and took a shower with the girl after she had been bullied by her father into cooperating.

Milbourne had sex with her, which the father walked in on.

“I was trying to look after my girl,” he disingenuously told the police later.

Benjamin Simon Clarke, 48, was an amateur photographer who used Craigslist to advertise his perverted interest in children, for which he had already served time for the abuse of a 12-year-old in 1988.

Clarke took pictures of the girl clothed and unclothed. He visited sex shops to buy the outfits he wanted her to wear and took her to a disused mine site to photograph her.

He sent the pictures to others he met online.

Nicholas Adam Beer, 36, was also into photography. The 28,000 child porn images on his computer were gruesome evidence of that. But he also took his own.

The girl’s father took his daughter to Beer’s Wanneroo home in March 2014, where she was shackled with bondage restraints by the hands and ankles to a bed and made to wear a black full-face mask with a mouth gag and a dog collar inscribed with the word ‘Bitch’.

Beer took hundreds more photos, and two videos showing him abusing the girl.

“She’s been incredibly abused and taken advantage of, but at (this) point she presents as somewhat desensitised to the process,” Beer’s lawyer Justine Fisher told the court blithely.

In the same month, 41-year-old David Volmer — a self-styled progressive pastor from a church in the Perth suburb of Carramar — was heard to be carrying on a “sexual double life”. Part of that was placing his own Craigslist ad offering a “sexual massage”.

The girl’s father answered. A hotel room was booked and the girl was subjected to further abuse.

Another man, Mark Wesley Liggins, 47, was also charged and convicted as part of Operation Ripstop and sentenced to more than two years behind bars in May. Although none of his offences involved the young girl at the centre of the Evil Eight case, he pleaded guilty to using the internet to procure five young girls to engage in sexual activity.

On Tuesday the last of the men, Alfred Impicciatore, who had pled not guilty, was convicted of abusing the girl.

He told police: “He told me she was 17.”

The guilty verdict brought to an end a two-year judicial process which began after a public tip-off to police, and prompted the girl’s removal from her northern suburbs home.

“We say this case represents one of the most serious examples of sexual offending against a child ever to appear before a criminal court in this state,” prosecutor Justin Whalley told the court during the father’s sentencing hearing last year.

Formally the police say the girl is now “receiving the care she requires”. Informally, no one knows if that will ever be enough.

If you have been sexually abused or know someone who has you can reach out to the National Child Abuse Hotline on 1800991099 or by emailing helpline@childwise.org.au.