Missing Dubliner William Maughan was asked by a gang to kill somebody, his dad has claimed.
Joseph Maughan told how his son in recent months got mixed up with a gang from surrounding areas and they "are not nice boys".
Mr Maughan said that his son had told the gang 'no', he said that he would not do that to another person.
"He made that clear," he said.
Speaking on Joe Duffy's Radio One show, Mr Maughan said that his son told him who the gang wanted him to kill. He has passed that information to gardai.
"My son has a conscience," Mr Maughan said.
The emotional dad said that the Maughan family are going through hell over the disappearance of Willie (34) and his partner Anna Varslavane (21), who have been missing for 11 days.
"We are going through a nightmare at the minute," he said.
His son and his partner went missing on April 14. They were last seen that afternoon in the Gormanston area of Co Meath.
"We are fearing for the worst for my son and for his partner," Mr Maughan said.
"My son was brought up really good. People bring up their kids to do the best they can, and that's all you can do with any child," he said.
His son was a plumber by trade, and his mum Helen is "devastated" at his disappearance, Mr Maughan said.
"I lost a son seven years ago this month on the 29th to bacterial meningitis. And he is buried in Bohernabreena Cemetery, and if I have to get my son back with his eyes closed, I want to lay him to rest with his brother," he said.
An emotional Mr Maughan pledged that he would also lay Anna Varslavane to rest in a proper manner if she is not alive. He said that they had given Anna's passport to gardai.
Mr Maughan said he is only hoping his son will walk up his street.