A coroner has delivered an open finding as to the manner and cause of Matthew Leveson's death, the week before the "well-liked, attractive and fun-loving" NSW man would have turned 31.
Deputy state coroner Elaine Truscott at Glebe Coroner's Court on Tuesday found Leveson died on September 23, 2007 in Sydney.
But she said there was no forensic evidence to support a cause of death, and the only person who knew how Leveson died, his boyfriend Michael Atkins, had lied under oath.
Atkins was acquitted by a NSW Supreme Court jury in 2009 of the murder or manslaughter of Leveson.
The 54-year-old long denied any involvement in or knowledge of Leveson's death but last year finally gave police information which led to the discovery of his remains in the NSW National Park south of Sydney in May 2017.
He did so as part of a deal to avoid perjury charges after he admitted lying under oath during his 2016 evidence to the inquest.
After striking the deal, Atkins gave a statement in which he said he panicked and buried Leveson's body after finding him dead from a drug overdose.
Ms Truscott, in her written findings, said the lies Atkins told during the inquest and to a range of people gave rise to "a reasonable degree of suspicion" that he had some connection with Leveson's death.
"However, it does not follow from that degree of suspicion that I can find that Mr Atkins was involved in any acts which were causative of Matt's death," she said.