North Queensland police and SES volunteers are searching through a Townsville dump to find a large hunting knife they suspect was used to stab boxer Quinton Donahue to death.
Police say they've received significant information indicating that the knife is likely to be among rubbish at the dump.
Detective Superintendent Ray Rohweder said the knife was key piece of evidence in the homicide case.
"We will continue to search the area very thoroughly, however it is a very difficult task," he said.
"The Townsville City Council has been outstanding in providing equipment to assist with the search and I would like to personally thank SES personnel for their assistance with this arduous task."
Jessie Gorman, 20, has been charged with the murder of Mr Donahue, a 37-year-old former Australian super-featherweight champion, on Sunday night.
Gorman, from Railway Estate, appeared in the Townsville Magistrates Court on Tuesday and was remanded in custody to return on June 7.
