A coroner is expected to deliver her findings into the death of Matthew Leveson after a lengthy Sydney inquest, which this year led to the discovery of his remains.
The 20-year-old was last seen leaving Darlinghurst's ARQ nightclub with his older boyfriend, Michael Atkins, in September 2007.
Atkins, who in 2009 was acquitted of murdering Matthew by a Supreme Court jury, long denied any knowledge of his whereabouts.
He finally led police to his bones at a national park south of Sydney after striking a deal last year to avoid contempt and perjury charges.
Police offered the 54-year-old the deal after he admitted lying during the investigation into Matthew's disappearance and while giving evidence during the inquest.
He told them he decided to bury Matthew in bushland after finding him dead in their bedroom from a drug overdose.
Matthew's parents Mark and Faye Leveson believe Atkins killed their son, possibly by strangulation or smothering.
Deputy state coroner Elaine Truscott is expected to deliver her findings into Matthew's death at Glebe Coroner's Court on Tuesday, some two years after the inquest began.