A man caught up in a brawl at a Wedge Island New Year's Eve party where James Dorloff died has such extensive injuries he will not be able to work for months.
Tyson Cumming, 25, suffered a deep wound and broken bones to his hand and wrist during an unauthorised party involving more than 600 revellers.
Joseph Robert Houston, 23, is charged with murdering Mr Dorloff. Mr Houston is also charged with intent to do grievous bodily harm by unlawfully wounding Mr Cumming.
Police allege Mr Houston used a machete or knife to fatally wound Mr Dorloff.
Mr Cumming's mother Tanya Candido said her son, a motor trimmer who worked in Malaga, had just bought a house.
"He is cut on his wrist from his hand down," she said. "It is pretty bad - he needs tendons and nerves to be repaired and has two broken bones at the top of his hand.
"He uses his hands (to work), so it is unfortunately going to be a long haul - he won't be able to go back to work for a long time."
Mr Cumming was flown to hospital on Wednesday from the remote Wedge Island settlement.
Mrs Candido said she first heard of her son's ordeal through her daughter, who sent her a message.
As of yesterday afternoon, her son was still awaiting surgery.
Mr Houston was remanded in hospital custody on Thursday to undergo psychological assessment and is due to reappear in Perth Magistrate's Court next week.
Jessica Gale, who suffered an ear injury at the party, has had surgery.
Ms Gale, 25, said she did not see the alleged murder and was still unsure how her injury occurred.