Teenager given life sentence for knife murder while on bail for slashing

Teenager given life sentence for knife murder while on bail for slashing43 minutes agoShareSaveAdd as preferred on GoogleDavid CowanScotland home affairs correspondentLisa PetrieJohn McNab was attacked in Leith last SeptemberA teenager who murdered a man with a hunting knife while on bail for a slashing has been given a life sentence with a minimum term of 17 years.The 17-year-old chased and killed John McNab, 22, in an unprovoked attack on Great Junction Street in Leith on 2 September last year.The fatal stabbing came four months after the youth was released on bail having been charged with a knife attack on a 16-year-old boy at Portobello Beach.The teenager, who cannot be named because of his age, previously pleaded guilty to both attacks.During sentencing at the High Court in Dundee, the judge, Lord Harrower, told the youth the "merciless attack" had taken the life of a young man with everything to live for.He added that the loss had left "an incalculable void in the lives of his family and friends".Teenager murdered man while on bail for earlier knife attackCCTV footage showed warehouse worker McNab begging for his life before the teenager stabbed him four times as he lay on the ground.In an exclusive interview with BBC Scotland News, the victim's mother Lisa Petrie said: "As a mum, that haunts me."Imagine how scared he was in that moment. That'll be with me for the rest of my life."On the night of McNab's death, some of his friends had been involved in a brief altercation with the teenager, who was struck and slapped on the face.The youth followed the friends to a nearby flat, shouting threats, and waited outside for more than two hours before targeting McNab as he left to get a taxi.The victim had not been involved in the earlier incident.In the CCTV footage, McNab could be heard pleading with his attacker, saying: "Please, please don't. I haven't done anything."He tried to run away but stum...