THE stepfather of Dean Fitzpatrick, who has been questioned in relation to the stabbing incident that led to the young man's death, has returned to where the body was found.
Dave Mahon (42) said he had "no comment" when asked if he was in contact with Dean's mother Audrey. She has now lost both her children following her daughter Amy's disappearance in Spain in 2008.
Mr Mahon, who was arrested by gardai investigating Dean's killing on Sunday, was later released without charge. A file was sent to the Director of Public Prosecutions.
It is understood he told gardai that the incident in which Dean died was unintentional and that he stabbed the young man in self-defence.
Mr Mahon left the apartment where he lived with Audrey Fitzpatrick at Northern Cross in Dublin just before lunchtime. He exited through a door that is just metres from where Dean was found with fatal injuries on Saturday night.
Wearing a grey T-shirt, jeans and runners, he was using a stick to walk because of hip problems.
He did not reply when asked if he was sorry about the incident that led to his stepson's death and was driven away by another man in a Ford Fiesta. Mr Mahon returned just over two-and-a-half hours later and went back in.
His partner Audrey told the Irish Independent that she hadn't heard from Mr Mahon. Asked about his arrest in relation to her son's death, she said: "I can't talk about that. I don't know anything about anything, so I can't speak about it."
Meanwhile, Dean's father, Christopher Fitzpatrick, arrived at the apartment block last night to lay rosary beads beside the growing number of floral tributes at the place where Dean died.
He made another appeal for people to come forward to help the gardai but said he couldn't comment on Mr Mahon's arrest.
Asked about his ex-wife and Mr Mahon, he said: "We don't speak."
His sister, Christine Kenny, accompanied him to the scene and praised gardai investigating Dean's death, saying: "They're doing a fantastic job. They're not going to leave any stone unturned."
She continued: "I would appeal for anyone who saw the incident, anybody that was passing by, anybody who was at a function at the hotel next door (to come forward).
"It doesn't matter how little or how big the information is. It may mean something."
Ms Kenny said that Dean's girlfriend, Sara O'Rourke, the mother of his baby son Leon, was "highly traumatised by the situation".
Sara had previously told this newspaper that Dean's death "hasn't sunk in", adding: "It's a horrible time."
Ms Kenny said of her family's feelings following Dean's death: "We're just broken. There are no words."
The family said that they did not know when Dean's body would be released to them or when the funeral would be held.