A teenager has been charged with murder and police expect more people will be charged over an incident that resulted in an alleged fatal stabbing at Weston skatepark last month.
A 16-year-old boy faced court on the murder charge on Wednesday morning, after an 18-year-old man was allegedly stabbed to death.
There are investigations under way as to the role cyber bullying played in the incident, which is alleged to have started after threats were made online.
A large group of teenagers and young adults were involved in a fight on the night, police said, and numerous weapons have been recovered.
Police allege the group agreed to meet at the Dillon Close park on the evening of September 27. When officers arrived on the scene about 1am, two people had stab wounds, including the 18-year-old man and a 16-year-old boy.
The 16-year-old boy was taken to hospital, while the 18-year-old later died at the scene.
Police alleged the boy who has been charged with murder used a knife to stab the 18-year-old multiple times.
The boy, who cannot be named for legal reasons, fronted the ACT Children's Court on Wednesday via audio-visual link from the Bimberi Youth Justice Centre.
He did not apply for bail and did not enter a plea to the murder charge, as well as to an additional charge of affray.
Magistrate Robert Cook told the boy the court appearance marked the first step in what could be a long journey.
"All I can encourage you is to be patient," Mr Cook said.
The 16-year-old will next appear in court on November 23.
On Wednesday morning, Detective Superintendent Scott Moller said he expected more people would face charges, he did not say what charges but indicated they would be serious.
"I absolutely expect more people will be charged and there will be further charges laid," he said.
"They will be serious charges and that's part of the ongoing complexity of this investigation."
Detective Superintendent Moller said cyber bullying among the group had been going on for some time. He said the group included teenagers as young as 15, as well as young adults. They were not all from the same school or area.
"The intricacies of the investigation I don't want to go into today but I can say the cyber bullying or the engagement online had been going on," he said.
"As we know the electronic medium now reaches you everywhere ... that's the key point. You don't have to be isolated to a suburb or to a school or group of friends."
A number of weapons related to the incident had been recovered and had undergone forensic testing, Detective Superintendent Moller said.
"Numerous weapons have been recovered, we have forensically tested lots and lots of items in this particular incident and will continue to test any forensic or evidentiary material we get," he said.
Police have spoken to a number of young people about the incident but have urged more to come forward.
"There has been a lot of cooperation [but] we would certainly encourage anybody else out there, I know there are other people, who have knowledge of this incident and I'd encourage them to come forward and talk to us at this time," Detective Superintendent Moller said.
Detective Superintendent Moller said it was an offence for anyone to use technology to threaten, intimidate, harass or humiliate someone with the intent to hurt them socially, psychologically or even physically on any social networking site.
"Cyber abuse and cyber bullying can quickly intensify in scale and nature, and feel deeply personal," Detective Superintendent Moller said.
"It can be hard but try not to respond or retaliate. If possible switch off your phone for a while and seek help.
"Before you block or delete the person and comments, make sure you save the evidence of what has occurred. This can help a police investigation if it's needed.
"You can attend your local police station, call 131 444 or if there is an immediate threat to your safety call Emergency Triple Zero (000)."
Anyone with information that could assist police is urged to contact Crime Stoppers on 1800 333 000, or via the Crime Stoppers ACT website and quote reference 6638633. Information can be provided anonymously.