The family of an A-level student stabbed to death just for looking at his attacker has called for knife murderers to get much tougher sentences.
Sister Zain Idriss reacted with anger when it emerged that the man who killed her 16-year-old brother would serve a minimum of only 12 years in prison.
Knife murderers must think 'I am not going to see daylight because I have taken someone's life', she added.
Victim Nas Osawe, an aspiring architect, was 'loving, kind, happy-go-lucky and lived life to the fullest', she said.
Mother Fulera Idriss (a Ghanaian hair and beauty therapist) called for a tougher stance, adding: 'They really don't care and they are still going to carry their knife. I have lost a son, a precious son.'
Nas, of Enfield, North London, was murdered two days after Christmas last year while going with friends to buy a cable for his Xbox console.
Ahmet Gomulu, 18, accused the group, who were waiting at a bus stop, of looking at him. He then laughed as he opened a 4cm (1.5in) blade and stabbed one of the friends in the side.
Nas, who was not known to his killer, was knifed twice after he and a second friend chased Gomulu in Islington, North London, the Old Bailey heard.
Gomulu, of Stoke Newington, was found guilty of murder and wounding with intent last month.
Handing down a life sentence yesterday, Judge Peter Beaumont, Recorder of London, said the killing was 'in response to a wholly imagined slight'.
Although knife murderers are given life sentences, their mandatory jail terms are far lower than the 30-year minimum for those who use a gun.