The Millennium Library closed its doors for six weeks after the fatal stabbing of December 11, 2022 . (Archive photo)
The four youths, aged 14 to 16 at the time, were all accused of stabbing Tyree Cayer.
Two of them have been sentenced to manslaughter and second-degree murder, respectively, in recent months.
The fourth young person who pleaded guilty to manslaughter should be sentenced in January.
The identity of the four young people is protected under the Juvenile Criminal Justice Act.
A publication ban is in effect and restricts the disclosure of details of what happened during the attack on Tyree Cayer, until the four cases took their course in court.
With information from Bryce Hoye