Policeman Peter Forsyth (pictured) was killed in Ultimo, Sydney, in 1998

The wife of a police officer stabbed to death by a teenager describes confronting her husband's killer in prison, months before he was released nine years early.

Murray Hearne was 18-years-old when he stabbed Sydney police officer Peter Forsyth and seriously wounded fellow officer Jason Semple in 1998, after approaching the off-duty policemen and offering them drugs.

Constable Forsyth's wife Jackie Reimer and his two small children, Mitchell and Brodie, were sleeping at their family home, less than a hundred metres, from where the tragedy occurred.

The father-of-two, and rookie Mr Semple were unarmed and off-duty with another officer, Brian Neville, when they left drinks at an Ultimo hotel in inner-Sydney.

They were approached by Hearne, who offered to sell the off-duty officers drugs, believed to be ecstacy.

The trio detained him and tried to check Hearne's ID, when the 18-year-old pulled out a knife.

He fatally stabbed Constable Forsyth twice in the heart, and his colleague Semple twice in the stomach.

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The wife of Sydney police officer Peter Forsyth who was stabbed to death by a teenager, broke down in tears as she described telling her young son that 'a man hurt daddy with a knife'

Constable Forsyth's wife Jackie Reimer (centre) and his two small children, Mitchell and Brodie, were sleeping at home, less than a hundred metres, from where the tragedy occurred

Years after the tragedy, Ms Reimer would confront her husband's killer, but it was not a meeting that came to her easily.

'I'm not going to take his apology and hear his excuses and make him feel better. So I always just said no,' she said on Wednesday night's episode of Murder Uncovered.

Months before he was released in 2014 however, Ms Reimer changed her mind and agreed to meet with Hearne at his NSW prison.

'I started thinking about it and thought, you know, this is going to be my only opportunity to actually get some answers.'

She describes Hearnes as being 'very nervous' and not some 'tough kid' anymore.

'He was like physically like hyperventilating and shaking and sweating, and he was really very nervous,' she said.

'He told me where he threw the knife, in a garbage bin.'

She said she would never forgive her husband's murderer.

'I went there on my terms and got what I wanted. I didn't want to give him anything back. He doesn't deserve anything from me, as far as I'm concerned; he's already taken too much. But I got what I wanted.'

Jackie (right) took Mitch aside and told him that somebody had hurt dad with a knife and the doctors couldn't fix him

Jackie broke down in tears as she recalled having to tell her son his father was dead

Earlier in the episode Ms Reimer broke down in tears, as she described the night her husband was killed.

Her nightmare beginning when she was awoken by knocking on the front door.

'I was fast asleep, in bed with the baby and I heard knocking on the door,'Constable Forsyth's widow said.

'I thought Pete had forgotten his key.'

Instead Ms Reimer, holding her six-month-old baby in her arms, was greeted by police officers who told her that her husband had been killed.

'I asked for some sort of help for the kids because I didn't know how I was going to break the news to Mitchell,' a tearful Jackie said.

'I didn't know how I was going to tell him, I didn't know what to say.'

She waited for Mitchell, also known as Mitch, to wake up as their inner-Sydney home filled with people.

'He woke up and I took him aside, away from everybody else and I just told him somebody had hurt dad.

'They had a knife and the doctors couldn't fix him. They tried and tried and they couldn't fix him. He's dead.'

Hearne was sentenced to 27 years prison for the murder of Constable Forsyth and seriously wounding Mr Semple.

Cop killer Murray Hearne, now 37, was released from prison nine years early, and went on to marry a psychologist he met behind bars. A Channel Seven investigation reveals the married couple have had a baby boy together.

Hearne (right) was released from prison in March 2014, after 16 years, during that time he begun a relationship with his prison psychologist, with whom he had a child

Hearne lives in Wagga Wagga, with Ms Bergmeier (pictured) who is now his wife and their baby boy

Hearne and his three mates fled the scene, sparking a massive manhunt.

Days later, in the early hours of the morning, he phoned a reporter at Daily Telegraph and made a chilling confession - while pretending he had acted in self-defence.

The reporter, Barclay Crawford, stayed on the phone to the killer for hours while police swarmed Hearne's apartment.

The 18-year-old was then arrested and charged.

Hearne was sentenced to 27-years in a NSW prison, but would only serve 16.

In his time at Junee Correctional Centre, Hearne met a young psychologist, Bobbie Bergmeier.

Four years before he was released, the convicted killer and psychology intern began a relationship.

Hearne fatally stabbed Constable Peter Forsyth twice in the heart, and Jason Semple (pictured) twice in the stomach

Constable Forsyth and rookie Mr Semple (right) were unarmed and off-duty with another officer Brian Neville (left) when they were confronted by Hearne who tried to sell them drugs

Ms Bergmeier split with her then-fiance to be with Hearne, and he was freed in March 2014.

The couple, now married, live in the NSW city of Wagga Wagga, with their baby boy. He will be one-year-old in April.

After the birth of the baby boy, Hearne wrote on Facebook: 'A new life added to this world.'

Axe murderer Keith Schreiber was one of those to congratulate Hearne on his new family on the Facebook post.

'Very happy days bro! Great to see you and yours doing so well man, welcome,' Schreiber wrote.

Constable Forsyth's devastated wife Jackie was left to raise two small children following the murder of her husband

Mitchell and Brodie were deprived of a life with their father after he was stabbed to death by Hearne

The axe murderer killed Wollongong man Jack Van Krevel and spent 12-years behind bars.

Constable Forsyth's widow Jackie Reimer said she he has had to accept the killer was now free with a family of his own, but hoped he could be a good father.

'Lucky lad. He's got a baby. Again, I have to accept that. All I can think of is, I hope he can be a good father to this child,' Ms Reimer said.

Hearne is still on parole and works as a cabinet maker.

Murder Uncovered airs Wednesday 15 February at 9pm on Seven and PLUS7 Live.