Detectives investigating the death of 53-year-old David Collin in Maroochydore on September 9 have located another potential key witness in his murder case they wish to identify.
Mr Collin was attacked as he slept in his sleeping bag at the rear of a community centre on Millwell Road East and located deceased the next morning at 8.30am.
The person responsible for his death remains unknown.
Investigators are seeking public assistance to identify a person, possibly female, seen on CCTV coming from the southern direction of Evans Street before reaching the intersection and crossing School Road.
The person may have been walking home, possibly from work, and can be witnessed turning around a number of times as though they have seen or heard something on Sunday night, September 8.
It follows an appeal last week to identify a male on pushbike seen on the same CCTV in the Evans Street, Millwell Road East intersection around 10:30pm.
Police are also asking for anyone with information regarding a hitchhiker in the Maroochydore area that Sunday night or early Monday morning, September 9 to come forward.
Motorists heading southbound on the Sunshine Motorway after 10:30pm may have seen a person walking from the Maroochydore area, or gave them a lift.