Police have found what they suspect is the knife used in the alleged nightclub brawl stabbing murder of Canberra bikie boss Pitasoni Ulavalu.
Detective Superintendent Scott Moller revealed on Thursday that a week earlier, in the initial stages of a "targeted" five-day search, the suspected murder weapon was located in a stormwater drain in Turner.
Police were "acting on information" when they looked in the drain, which was about 300 metres from where officers say the alleged killer, Sydney man Frederick Elijah Mercy Tuifua, was last caught on camera.
Detective Superintendent Moller confirmed the knife was now undergoing forensic analysis.
He said police were also examining "a multitude" of other items, including clothing, that were found during the multi-agency search.
The search, which wrapped up on Tuesday, spanned large parts of the inner north suburbs of Braddon and Turner.
The revelation that the knife had been found came hours after a fifth man was locked up over his alleged role in the July 19 fight that included the fatal stabbing of Mr Ulavalu, the Comancheros' Canberra chapter commander, at Kokomo's in Civic.
The 26-year-old Canberra man appeared in the ACT Magistrates Court on Thursday morning, charged with affray.
He did not apply for bail or enter a plea, and the court heard only that he was accused of "engaging in violent conduct" directed towards Comanchero bikie Zachary Robb.
Despite noting that she was "not keen on these orders", Magistrate Beth Campbell granted an application to suppress the man's name over concerns for the safety of his family.
She also agreed to suppress the identity of the man's lawyer, who told the court the publication of his name may assist members of the public to identify the man.
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Police made the first major breakthrough in the case on Wednesday last week, when they charged Mr Tuifua with murder.
On the same day, officers also charged western Sydney brothers Matthew and Osaiasi Kupu with affray in relation to the July 19 incident.
Those three were arrested after they accompanied another man, Maximilian Ellis Kurt Budack, to a hospital emergency department in the early hours of last Wednesday.
Mr Budack, who is understood to be a Canberran, had been shot three times in an incident that remains under investigation. He required emergency surgery and has also been charged with affray.
Detective Superintendent Moller said on Thursday that Mr Budack was in a stable condition and still under police guard in hospital.
None of the five charged in connection with the brawl so far have applied for bail or entered pleas.
Police continue to investigate the Kokomo's fight, and detectives anticipate further arrests and charges.
Officers have already identified more than 200 witnesses and reviewed several hours of CCTV footage.
"This is a horrific incident that happened in public view," Detective Superintendent Moller said.
"As police, we're not going to stand and let this happen in our community.
"We will continue to do everything we can to investigate and put the people responsible before the courts."
Police are now seeking dash cam footage from anyone who was travelling through streets to the west of Northbourne Avenue, between Barry Drive and Wakefield Avenue, Turner, between 12am and 1am on July 19.
They asked anyone with such footage to call police on 131 444.