Gardai investigating the discovery of the skeletal remains of Stephen Corrigan in Rathmines are confident he died where he was found.
However, they have not yet fully established the cause of his death.
The investigation into his death will continue while gardai try to trace relatives of the troubled man, who was reported missing in November 2011.
If nobody comes forward then plans will be made to bury him in Glasnevin Cemetery with his mother Anna and half brother Edward, who died in 2015 and 2016 having never found him.
Only months before she died, Anna Corrigan had given gardai a DNA sample which was kept on record.
It was this sample that led to the bones that were found at grounds of the Lissenfield apartment complex on April 9 being positively identified as those of Stephen. Born in 1963, he would have been 57 today if he had lived.
"We are appealing for any relatives of Stephen to come forward so they can be part of his funeral arrangements, but so far we have not been able to find living relatives," said Detective Sergeant David Wogan, of Rathmines Garda Station.
"It seems that all Stephen and his mother and brother had in life was each other, and we are hoping to find someone who might like the opportunity to say their goodbyes to Stephen," he added.
The skeletal remains are believed to have been undisturbed under a row of mature evergreen trees that had branches down to the ground on the perimeter of the small apartment complex car park.
"The lower branches were cut off the trees last December, and in a follow-up clearing operation to get rid of undergrowth in April, the bones were found," said Det Sgt Wogan.
Stephen had been in the care of the Weir Home on Cork Street, a residence where nursing and psychiatric care was provided for men at the time.
Any member of the family, or anyone who has information about family members, is asked to contact Rathmines Garda station on (01) 666 6700 or the Garda Confidential Line on 1800 666 111.