Police are seeking information about the unexplained death of Brett Whittaker, 54, who was found unresponsive at a home in Manly, Sydney, on 11 June. Although officers currently have no evidence that his death was suspicious, detectives want to establish how he became seriously unwell and whether anyone can clarify his final hours for his family.

Paramedics were called to Cove Avenue at about 6.20am but could not revive Mr Whittaker. Police have confirmed he was alive at 2.30am and that several people had been with him at the unit the previous day, leaving a gap before he was found; his twin sister Janine has appealed for those with information to come forward.