A teenager murdered a 13-year-old boy by "jumping up and down on his head".
Jordan McCready, 17, from Dreghorn, attacked Jon Wilson as the youngster made his way home in the early hours of September 4, 2011.
At the High Court in Edinburgh on Friday, McCready was sentenced to life with a minimum of 14 years for the murder. McCready also slashed a stranger and robbed a teenager of his mobile phone after the killing.
Schoolboy victim Jon had been intending to stay overnight with a young friend the day before and called his mother to tell her. However, he changed his mind and headed back to his home in Gateside Place, Kilmarnock, at about 2.15am the next morning.
Soon afterwards, CCTV footage showed him coming into contact with McCready - who had earlier drank vodka, Buckfast and taken valium pills - in the town's Queen's Drive.
The prosecutor told the court there were no eye-witnesses to what happened during the attack, but at about 2.30am witnesses heard "coughing and spluttering noises" coming from the scene of the killing.
After being discovered by a member of the public, the second year Kilmarnock Academy pupil was rushed to hospital suffering from significant head injuries. He was found to have irreversible brain damage and died on September 5.
McCready told police how he had "jumped up and down on a boy's head".
Kilmarnock Procurator Fiscal Mirian Watson said: "The brutal and unprovoked murder of 13-year-old Jon Wilson caused widespread shock and revulsion in the community in Kilmarnock, and beyond.
"The level of violence inflicted by Jordan McCready on a complete stranger was truly abhorrent, as was the attitude he displayed towards the crime afterwards.
"Violent crime cannot be tolerated in our society and as prosecutors, we will continue to do everything in our power to ensure that such crimes are robustly dealt with."
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