Owen Rooney, 24, checked himself into Boundary Hospital after suffering a bad reaction to hallucinogenic mushrooms at the Shambhala Music Festival. He had also been beaten in nearby Christina Lake on his way back to Kelowna.
After an overnight stay, Rooney mysteriously left the hospital, leaving his backpack, cell phone and wallet behind.
An Interior Health internal investigation showed the hospital should have done more to help the depressed young man, like notifying social services and calling his family.
His mother Sharron Rooney spent eight months in B.C. trying to track him down after he disappeared. She has since returned to Australia but is still looking for leads.
"The family is asking for resolution,” she said.
“We love Owen absolutely to the maximum. We don't care what information it is — it can be as good as bad or — nothing that anybody can tell us will be any worse than what we've imagined."
Rooney is described as being five feet eleven inches tall and with a 'Made In Australia' tattoo on his right leg.
Anyone with information is asked to call the RCMP.