A member of the so-called "Evil 8" paedophile ring has gone to WA's highest court to challenge his conviction, claiming he only made admissions to police after they went on a "witch hunt" and "paraded" him in the streets.

Key points: Alfred Impicciatore was one of eight men charged over abusing a young girl

Alfred Impicciatore was one of eight men charged over abusing a young girl She was repeatedly sexually assaulted while her father watched or took part

She was repeatedly sexually assaulted while her father watched or took part He claims the police made errors in his arrest that make his conviction invalid

Alfred Impicciatore is serving a nine-and-a-half-year jail term for sexually abusing a young girl who, when aged between 10 and 13, was pimped out to strangers by her father.

Impicciatore was convicted after a trial was shown a video recorded interview he did with police after his arrest in May 2015, in which he admitted he had sex with the girl, but said her father had told him she was 17.

Arrest a 'show of force'

Impicciatore represented himself in the Court of Appeal today to argue that the video interview never should have been allowed to be used as evidence against him because he did not participate in it voluntarily.

He claimed that in the lead-up to the interview, he was arrested at his house in front his neighbours, in what he called "a show of force" and "witch-hunt".

He said he was then driven to other addresses where police "pointed their finger" at him.

"That's pretty debilitating … it does amazing things your mind," he told the court.

"I'm bipolar, I'm dyslexic. I don't handle pressure very well … it affected me substantially.

"They paraded me in the street like a stockade, it was akin to that."

Impicciatore also alleged that police deliberately misled him into thinking he had spoken to a lawyer about whether he should take part in the interview.

He told the court he did speak to a man, who told him it was up to him whether he participated or not, but he now believed that person was not a lawyer.

"It was advice given to me by someone pretending to be a lawyer," Impicciatore said.

Police interview 'inadmissible'

Impicciatore's second ground of appeal was based on his "unlawful detention" by police beyond the six-hour limit, which the law stipulates.

If police want to extend a suspect's detention beyond that time, it has to be authorised by an officer not involved in the investigation, but in Impicciatore's case the approval was given by an officer who was involved.

During that extended time Impicciatore made confessions, which he said should have been ruled inadmissible.

Impicciatore tried to have the video interview thrown out in 2017 before his trial, but a District Court judge ruled that the detectives had made an honest mistake and the interview was admissible.

Impicciatore was the only one of the so-called "Evil 8" to defend the charges against him. ( ABC News )

Today Impicciatore alleged that judge had made an error of law because she had taken into account "irrelevant material" and had not considered "the entirety of the circumstances".

He also claimed that his lawyer was "shut down" when she tried to raise the issues at the hearing.

Impicciatore was the only one of the so called "Evil 8" to defend the charges against him.

Another six men admitted the offences and were given jail terms of between three and 13 years.

The father also pleaded guilty and was given a record 22-and-a-half-year jail term, which last week was increased by a year after he admitted a further six offences that the girl disclosed in an interview only last year.