A 17-year-old boy has been handed a life sentence, for stabbing a teenager to death after he'd tried to gatecrash a party.
Ahmed Ahmed was ordered to serve a minimum of 15 years after being convicted of the murder of Thomas Overton, 18.
Mr Overton was stabbed through the heart after being turned away from a house party in Leyton, with his brother and a group of friends, in August last year.
A group of youths followed them away from the party, chasing them down the road, before Ahmed attacked Mr Overton.
Judge Charles Wide said Mr Overton's group were running away and were no threat to Ahmed.
He told Ahmed: "Tommy Overton was not as nimble as the others in the group. He was attacked from behind. He turned round and fought back with his brother.
"You simply ran up and stabbed him through the heart. CCTV shows an element of swaggering as you walked off and discarded the knife."
VIDEO: CCTV shown at the trial
Mr Overton staggered off but was attacked again and stabbed a further six times by youths as he was dying. He managed to get home before collapsing in front of his family.
The court was told Ahmed was being supervised by the probation service, under a rehabilitation order for having drugs, when he killed Mr Overton.
Another teenager, Kondwani Phiri, 18, of Forest Gate, east London, was found guilty of violent disorder and given three-and-a-half years of detention.
Detective Chief Inspector Cliff Lyons said: "This is a tragic case whereby a surprise 16th birthday party turned from celebration to despair."
VIDEO: Detective Chief Inspector Cliff Lyons