An abuse survivor fears a failure by authorities to bring his alleged attacker back to Scotland from abroad has robbed him of justice.
The man made a complaint to police about his former football coach at his school in 2015.
The teacher, who claimed to be a Celtic scout, is wanted over allegations he carried out a string of sex assaults on boys in his care in the 60s and 70s.
Scottish and European warrants for his arrest have been in place since 2016.
But the 76-year-old is believed to be living in Vietnam and out of the reach of UK and EU law enforcement agencies.
The Crown Office has said extradition proceedings are “ongoing”.
However, the victim who reported the former coach has criticised delays in the case and branded the warrants “worthless”.
The 65-year-old dad said: “I kept this to myself for decades. It took me a long time to come forward. But six years later nothing has happened and the agony is being prolonged.
“The Crown Office said they’re liaising with the country he’s in. That’s it.
“They won’t tell me where he is but I’ve heard he’s in Vietnam. He’s living there with a woman and her family.
“Someone spoke to him in Dubai Airport.
“I don’t know what the delay is but I want him brought back to Scotland.”
There is no extradition agreement between the United Kingdom and Vietnam.
The suspect can only be arrested if he travels back to the UK or Europe unless government officials agree his departure.
He is unlikely to voluntarily leave south-east Asia, his alleged victim believes.
The man, who did not want to be named, added: “He isn’t going to come back to Scotland, the UK or Europe so the warrants are worthless – not worth the paper they’re written on.
“The authorities have known about him for six years. How many more people could have fallen victim to him during that time?
“Football has been under the spotlight and I’ve seen plenty of historic abusers dragged to court and brought to justice but years later I’m still hanging on.
“Not enough has been done to bring him to justice.”
The coach, who cannot be named for legal reasons, worked as a teacher at a secondary school in Paisley. It is alleged the school team’s coach – who was involved in youth football across Renfrewshire – abused boys at a property in Argyll.
At least two alleged victims have made sexual assault claims.
The man says he was abused for two years, starting when he was 12. The trauma has led to two failed suicide attempts.
He also told how the coach was an associate with Celtic Boys’ Club founder Jim Torbett, 73, who was jailed for six years in November 2018 for abusing three boys over an eight-year period.
The alleged victim said his school would regularly play Torbett’s teams and he claimed to be a scout for Celtic.
The man said: “He was a young teacher when I started school.
“He took a few of us to football games and to a house in Argyll for weekends. That’s where the abuse started.
“It had two bedrooms and a settee in the living room. One bedroom was used by the person living there. He said one of us had to sleep with him and he’d rotate it each night.
“One of the times it happened to me was on July 21, 1969 – when Neil Armstong walked on the moon. That’s always stuck in my mind.
“I believe other boys there were also being abused.”
He added: “The coach was very tight with Jim Torbett.
“We always played Celtic Boys’ Club.”
The man and a friend, who has since passed away, were contacted by police in the mid-90s.
They were asked whether they were abused by the suspect but both denied they were victims. He said the decision to remain silent about the abuse triggered depression.
He added: “I told the police nothing.
“My pal was also contacted and he’s denied being abused. But I later found out he was a victim.
“I felt guilty for not speaking out earlier but I wanted to protect my family.
“Then I had a panic attack when I realised someone must know because my name was given to police.
“It sent me into depression. I lost my job and my marriage.
“I couldn’t cope but luckily I survived two suicide attempts.”
He added: “I came forward in 2015 and it’s still hanging over my head.
“I’m in my 60s and my abuser is even older. I want this dealt with before he gets away without answering to his crimes.”
A Crown Office spokesman said: “Extradition proceedings are ongoing in relation to this individual.”