THE mother of teenage killer Callin Wilson had warned that he would harm someone if not properly supervised.
Wilson was 18 years old when he stabbed Syrian refugee Hazem Ahmed Ghreir through the heart in Belfast.
Judge Patricia Smyth this week sentenced him to life in prison with a minimum term of nine years, but he will have to be assessed by parole commissioners before he is considered for release.
The Probation Board assessed him as having a high likelihood of reoffending and presenting a significant risk of serious harm to the public.
Mr Ghreir - who had made his home in Belfast after fleeing war-torn Syria in 2015 with his brother Rami - died from a single stab wound to the heart in June 2017.
Belfast Crown Court heard that while Wilson had given numerous and differing accounts of what happened that evening, it seemed likely Mr Ghreir (30) was attacked after intervening when he saw him engaging in "inappropriate behaviour" such as tampering with a bicycle.
In reaching a nine-year tariff, Judge Smyth noted in mitigation that Wilson, originally from Scotland, suffered with a diagnosed mental disorder.
He had been referred to child and adolescent mental health services by his GP when he was just 12 after displaying signs of aggressive and self-harming behaviour, but failed to attend appointments.
By the time he was 15 there were "concerns about impulsive and opportunistic behaviour, cruelty to animals and inappropriate sexual behaviour".
Social services and a senior doctor had recommended he be supervised at all times due to the high risk he posed.
That included full-time supervision by two assistants at all times in school, one of whom was to be male, increasing to three members of staff by December 2013.
Despite this supervision he tried to put wire around a female teacher's neck from behind.
Wilson's own mother predicted that he would harm someone and Judge Smyth noted in her summing up that "her prediction has tragically come to pass with the murder of Mr Ghrier".
At the time of the attack, Wilson was living alone in accommodation for homeless young people in north Belfast without any supervision of the nature recommended previously to manage his risk.
Sentencing Wilson, now aged 20, Mrs Justice Smyth said: "Having carefully considered all of the evidence, there is no question that you pose a significant danger to others.
"Questions need to be asked how the safety net deemed necessary to protect both you and innocent members of the community failed to emerge, so that tragedies like this do not happen in the future."
