It was one of Tasmania's most notorious crimes — the abduction, repeated assault and torture of a young couple that culminated in the man's murder.

Key points: Jamie John Curtis and a teenage accomplice attacked Dean Allie and his fiance in their home in 1986

Jamie John Curtis and a teenage accomplice attacked Dean Allie and his fiance in their home in 1986 Curtis was released on parole in 2018 but is back in jail for multiple offences

Curtis was released on parole in 2018 but is back in jail for multiple offences A judge described his crimes as "unprovoked, brutal, prolonged, indiscriminate and callous"

In 1986, Jamie John Curtis was sentenced to life for crimes a judge described as "the worst one was likely to encounter".

Last year, after 32 years behind bars, Curtis was granted parole, but was sent back to jail for multiple offences. On Friday, Curtis is expected to seek parole again.

His surviving victim believes he will kill again and is pleading with authorities to keep him locked up.

She wants to warn the public about Curtis but under Tasmanian law, she cannot be identified. She can only be known as "Alicia".

Jamie John Curtis's jail term began in 1986. ( Supplied )

Twelve hours of terror

Dean Allie and his fiancee were abducted, assaulted and tortured by Curtis in 1986. ( Supplied )

On the morning of February 15, 1986, Alicia was asleep in bed with her fiance, 22-year-old Dean Allie, at their flat in Glenorchy, a suburb of Hobart.

"I heard a knock at the door. Dean got up and opened the door. And then the next thing I know I had somebody's hand over my mouth and a knife at my throat," Alicia told the ABC.

Curtis, then 30, and his teenage accomplice had forced their way into the flat. They repeatedly punched and kicked Mr Allie, tied his hands and feet, and put him in the shower.

"Jamie Curtis said to me 'If you don't do exactly what you're told, you'll end up like your boyfriend'," Alicia said.

The men repeatedly raped 17-year-old Alicia as her fiance lay helpless in the adjoining bathroom.

"They both assaulted me, separately and together," she said.

Mr Allie tried to escape from the bathroom but was brutally bashed again.

Curtis and his accomplice then drove the couple, in their car, to a sheep property in Gretna, about 40 minutes from their flat.

"I said 'Can we go now? You're obviously where you need to be'," Alicia said.

"Jamie Curtis said to me 'Are you stupid? We're not letting you go. You've been conned. You're not going anywhere. We'd get 10 years for what we've just done'."

"My heart just sank because I thought: 'They are going to kill us.'"

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'Have you ever felt the blade of a chainsaw?'

Curtis siphoned some petrol from the car and poured it into a chainsaw.

"He initially threatened that he was going to cut us both up with a chainsaw. He laughed, he thought it was funny," she said.

Dean Allie was murdered by Jamie John Curtis and an accomplice in 1986.

Curtis told the couple it would be like the movie, The Texas Chainsaw Massacre.

"They started up the chainsaw and taunted us with it. And Jamie Curtis said to me: 'Have you ever felt the blade of a chainsaw on your bare skin?'"

Curtis ordered Alicia into the boot of the car and led Mr Allie into the bushland, where he and his accomplice stabbed him repeatedly.

The pair released Alicia from the boot and told her they had murdered Mr Allie. They taunted her with the bloodied knife and showed her his body.

"I was scared because up until that point there'd been two of us and now, all of a sudden, it was just me. And I thought if they're capable of doing that, they're capable of killing me as well."

Curtis and his co-offender sat on the river bank and drank beer until it ran out. They drove back to the pub for more and Alicia tried to escape.

"I opened the door and I got halfway out before he grabbed me by my hair and started pulling me back in. He drove out of the pub like a maniac."

'I just want you to end it'

Back at the bush clearing, Alicia pleaded with Curtis to end her life.

"I found the knife, put it in his hand and said: 'Just kill me now, just finish it, just get it over and done with. I'm not going to be your little toy. I just want you to end it.'"

Curtis refused and attempted to rape Alicia again but she put up a fight.

"I said: 'No, you're not raping me again, it's just not happening.' And I bit him. I bit him as hard as I possibly could."

Eventually, both men passed out drunk. Alicia was found by the farm owner, who called the police.

Curtis pleaded guilty to murder and a string of other offences and was sentenced to life imprisonment.

The court heard that just hours before Curtis and his accomplice attacked Alicia and Mr Allie, they had abducted a 15-year-old girl who was on her paper delivery round. She had managed to escape from the boot of their car.

Just a few months into his sentence, Curtis escaped from Hobart's Risdon Prison in a laundry van, sparking a week-long police manhunt. He was caught hiding in bushland near the crime scene.

Curtis's prison escape dominated newspapers in 1986. ( Supplied )

Case ranks as 'worst one is likely to encounter': Judge

In 2002, Curtis applied to have his life sentence re-determined. The judge said his conduct "beggars description".

The judge said the crimes were "unprovoked, brutal, prolonged, indiscriminate and callous" and that the case ranked among "the worst one is likely to encounter".

He resentenced Curtis to life imprisonment because he "represented a serious danger to the community which warranted protection of the public from him for the rest of his life".

The judge fixed a minimum parole period of 30 years.

Curtis's accomplice, who cannot be named for legal reasons, was originally sentenced to life imprisonment. In 1996 he was resentenced to a maximum term of 30 years and was paroled in 2007.

'Polite and courteous' Curtis paroled

Jamie John Curtis has been in Tasmania's Risdon prison for more than 30 years. ( ABC News: David Hudspeth )

Last year, after serving 32 years in jail, Curtis was released on parole.

Jamie John Curtis uploaded this photo to multiple dating profiles when he was released on parole in 2018. ( Supplied )

The parole board was told Curtis was "polite and courteous" to prison staff and had taken part in anger management and "getting smart" programs.

His treating psychologist told the board that Curtis had an incurable personality disorder, with multiple psychopathic traits.

The psychologist advised his condition would require "long-term work, with intensive engagement".

But a key protective factor was Curtis's age, together with his employment, hobbies and therapeutic compliance.

Within days of his release, Curtis set up numerous false profiles on dating websites, romancing a string of women who had no idea of his criminal past.

Several weeks later, police allege Curtis assaulted a new girlfriend he had met online. He was sent back to jail for multiple breaches of his parole conditions.

On Friday, Curtis is expected to apply for parole again.

Alicia constrained by victim 'gag law'

"Alicia" has been able to live a reasonably normal life on a rural property in Tasmania. ( ABC News: Peter Curtis )

Alicia wants to lead a public campaign against his release, but she is constrained by a law in Tasmania which prevents rape survivors from speaking under their own names.

Section 194K of the Evidence Act is under review, thanks to the #LetHerSpeak campaign, led by rape survivor advocate Nina Funnell.

The Tasmanian Government has indicated it will amend the law early next year.

But that will not be soon enough for Alicia. She can only warn against Curtis's possible release with her face hidden, under an assumed name.

"How many chances does he need? What will it take? Will it take for him to murder somebody?" Alicia said.

Over the past 30 years, Alicia has been able to lead a relatively normal life. She has a full-time job and lives with her family on a rural property with her horses, dogs and a variety of farm animals.

"I haven't lived in fear," she said.

"I've functioned. But when he was granted parole last year, I was really frightened. This will never be behind me."

Curtis deserves a second chance: Barrister

Curtis has spent most of his adult life in prison. ( ABC News )

Greg Barns, defence barrister and head of the Tasmanian Prisoner's Legal Service, says Curtis deserves a second chance.

"So long as there are the appropriate supports, then people are entitled to be reintegrated into the community even though they might have failed on the first occasion," Mr Barns said.

"We need to remember that depriving someone of their liberty for 30 years is a long time, irrespective of the crime they've committed. And we need to balance that against victims."

Mr Barns said there was a lack of rehabilitation opportunities for prisoners and unrealistic expectations they would not re-offend when they were released.

"We don't and won't spend money within the prison system to ensure that's the case," he said..

'God forgot her that day '

Alicia has the support of high-profile former detective David Plumpton.

The retired Tasmanian police inspector is well known for his work on the cold case of Lucille Butterworth, a young model who went missing from Hobart in 1969.

Ms Butterworth's late brother Jim Butterworth introduced Mr Plumpton to Alicia a few years ago.

Former police inspector David Plumpton describes Curtis's crimes as "unparalleled" in Tasmania. ( ABC News: Peter Curtis )

Mr Plumpton said Curtis's crimes were among the worst in the country.

"If you've been a detective, you know that crime; this is a crime that is unparalleled in Tasmania, possibly Australia," Mr Plumpton told the ABC.

Mr Plumpton has recently been appointed to the Tasmanian Parole Board but because of his longstanding friendship with Alicia, he has recused himself from considering Curtis's application.

But he still risks his position on the board by speaking publicly about the case.

"She is a victim of one of the most horrendous crimes. I say God even forgot about her that day," Mr Plumpton said.

"It's difficult to describe. You use words like abhorrent, you use words like horrendous but you've got to throw away those words. This was more than that. This was evil.

"For a lengthy period of time, evil visited itself upon those two people who were doing nothing other than resting and enjoying their own home.

"I support her, because that's what you should do and now is the chance for the state to support her."

Alicia plans to apply to the Tasmanian Supreme Court for an exemption from section 194K. This would allow her to be publicly identified.