A neighbour killed a reclusive Sydney man whose beaten and stiff body was found in a utility closet, a coroner has concluded.
But deputy NSW coroner Elaine Truscott says there is currently insufficient evidence to charge the "sole suspect" responsible for Rodney Scarman's death.
The 52-year-old's body was found on Boxing Day 2011 in his Waterloo unit block.
His skull was fractured, larynx crushed and torso substantially beaten, while his blood had seeped under the closet door, Ms Truscott said.
Outlining the likely manner of Mr Scarman's death, she said he went to a nearby unit block on Christmas Day and confronted someone he erroneously believed was responsible for a $160 debt.
"This confrontation was met by the occupant inflicting blunt force injuries to Rodney Scarman which resulted in him falling which have occasioned further injuries," Ms Truscott said in her findings on Monday.
His body was left in situ for hours, allowing rigor mortis to set in, before the suspect then moved the body in a wheelie bin to Mr Scarman's unit block.
"This person then moved the body to Mr Scarman's unit block likely intending to return Mr Scarman to his own unit but rather than negotiating the stairs ... left him in the utility closet," the coroner said.
Police had made several appeals to the public for information but didn't believe they had enough evidence to charge the sole suspect, she said.
"I agree with that conclusion but note that advances in technology and future occurrences may lead to a resolution of this investigation," she said.
Much of the police case remains suppressed to protect future investigations.
The case will be registered with the unsolved homicide unit.
Mr Scarman's sister addressed the inquest about her brother's gentle ways, artistic skills and struggle with substance abuse.
She spoke of the grief she had in knowing that he suffered a violent death, the coroner said.