Jailed republican hitman Frankie 'Studs' Lanigan is set to be questioned in his cell about the murder of a Manchester car dealer 21 years ago.
The 56-year-old, who has been linked to nine killings, is suspected of gunning down Belfast-born Pat Logan at his home in 1999.
The dead man's daughter, Sinead Logan, told Sunday Life: "I don't want my dad just to be another number. I want someone prosecuted.
"Seeing this man's face (Lanigan) and thinking this could be the man who killed my dad was a real, real shock. It's made me feel unsettled."
Sinead is to meet with Greater Manchester Police (GMP), who have this weekend revealed there is a £50,000 reward on offer to catch the killer.
She wants detectives to travel to Maghaberry Prison to question Lanigan, who was jailed for life last month for the 1998 murder of John Knocker outside a Dungannon nightclub.
A spokesperson for Greater Manchester Police said: "We will never close an undetected murder and our thoughts are with Patrick's family and friends as we so dearly want to bring justice for them.
"Allegiances will change over time and we need witnesses who know what happened to Patrick to come forward and help us provide those unanswered questions for his family and friends. There is a £50,000 reward on offer for any information that will help lead to an arrest and conviction.
"Anyone with any information should contact GMP's Cold Case Review unit direct on 0161 856 5978 or Crimestoppers, anonymously, on 0800 555 111."
Lanigan worked as a hitman for hire after fleeing across the border to Dublin following the killing of 22-year-old west Belfast man Knocker.
IRA figures in the south provided him with a new identity, that of barber 'Ciaran McCrory', as a reward for carrying out shootings on its behalf while Sinn Fein was locked in political negotiations that brought about the 1998 Good Friday Agreement.
One of these killings, that of major Belfast drug dealer Brendan Campbell, occurred just weeks before the peace accord was signed.
Pat Logan, who left Belfast for England aged 15, is understood to have provided the weapon used in the Campbell murder via the Manchester-based Noonan crime gang.
Republican sources say the dad-of-two had no idea what the gun was to be used for, and became nervous after discovering it was linked to an IRA killing.
Fearing Logan might talk if arrested Lanigan is suspected of travelling across the Irish Sea to murder him. His address was provided by gangland boss Dessie Noonan, an IRA sympathiser who the 40-year-old was friendly with and who was stabbed to death in 2005.
After breaking into Logan's home Lanigan is alleged to have shot him five times in the chest as he made a frantic 999 call to police. An accomplice was heard referring to the gunman as his alias 'Ciaran' during their escape. This remark has reinforced Sinead Logan's belief that Lanigan is likely to have killed her dad.
She said: "That made me think is it him? Whoever killed my dad was certainly a professional who had killed before."
The same year that he is accused of travelling to England to murder Pat Logan, ruthless hitman Lanigan is believed to have made an earlier journey to murder IRA informant Martin McGartland who was in hiding in Durham.
The double agent miraculously survived the gun attack and has called for DNA found at the scene to be tested against Lanigan.
Other fatal shootings Lanigan played a prime role in are those of senior UVF members Trevor King, Colin 'Crazy' Craig and Davy Hamilton, who were gunned down by the INLA on the Shankill Road in 1994.
Further victims include Samuel Rock, Jack Murphy and Jack Smyth, who were killed by the INLA between 1993 and 1994.
Lanigan is also alleged to have murdered Belfast drug dealer Kevin McAlorum in 2004 - a crime he denied in a letter written to Sunday Life from his cell.
He was questioned about the shooting by police who visited him in Maghaberry Prison last year. Now detectives are set to return to the high-security jail, only this time from Manchester to grill the west Belfast born hitman about the Pat Logan killing.
Sinead Logan accepts that her father did have links to criminality, and is aware of a photograph of him with murdered gangland chief Dessie Noonan at a republican demonstration in Manchester. However, her memories of the murder victim are that of a loving dad who doted on his children.
Fighting back tears, she said: "He was a brilliant dad. It upsets me to talk about it. He was always in our lives even though he and my mum had separated. We saw him every week, he took us for days out.
"He looked after me when I was born, my mum went back to work and my dad looked after me for a long time because he was a roofer who was out of work. He was, to me, the best dad. That's why it was so traumatic. I wasn't dragged up, I had a good upbringing, I had everything I wanted.
"He helped give that to me, a very stable upbringing, and it's wrong to say this but it (the murder) kind of brought shame on him."
Following her father's murder Sinead, who was aged 13 at the time, removed herself somewhat from his side of the family as a coping mechanism.
She suffered terribly from nightmares, but now an adult with children of her own she is determined to see his killers prosecuted.
"I don't know what he (Pat Logan) was involved in, but at the end of the day he was my dad and he was my world," said Sinead.
"His murder ruined my life. I grew up without a father figure. I have had awful depression and anxiety, and have had nightmares for years."
In its most recent appeal for information about the Pat Logan murder Greater Manchester Police said it could have been carried out by a hitman, and detectives were investigating the victim's links to criminals in Northern Ireland and England.
The Noonan crime gang, who he was close to, were involved in more than 20 murders and dozens of robberies netting millions of pounds.
Its former leader Dessie Noonan was an IRA sympathiser and was regularly seen at republican rallies in Manchester, often in the company of senior figures in the organisation.
When Logan voiced concerns to the Noonans that a 'clean' weapon he provided was used by the Provos to gun down a Belfast drug dealer the decision was taken to kill him, with hitman Frankie Lanigan sent to England to carry out the murder.