http://www.bbc.co.uk/news/uk-england-london-18420545'A 15-year-old boy convicted of murdering a student in a row over throwing conkers in north London has been given a life sentence.
Steven Grisales, 21, was stabbed in the heart in College Close, Edmonton, last August after he went to talk to some youths, the Old Bailey heard.
The group had been throwing conkers which were in their spiky casing.
The killer, who cannot be named because of his age, was detained for a minimum of 10-and-a-half years.
..........'The defendant had been in court for burglary and robbery and was subject to electronic tag monitoring as part of a rehabilitation order imposed the month before the murder.
The prosecution told the jury the youth had removed the tag two days before the killing.
Judge Richard Marks said the boy's pre-sentence report made "grim reading" and mentioned two incidents with knives, one at school and the other involving his mother.
He added that Mr Grisales had been "an outstanding human being in many ways".
The student had been shopping for his grandmother and was on his way to Silver Street station in Edmonton when he was attacked.
......Det Insp Richard Beadle, of the Homicide and Serious Crime Command, said: "Steven did no more than stand up to an unruly youth and for that he has lost his life."
He said it was the "courageous intervention" of a local resident which stopped the knife attack from continuing.
"The man placed himself in front of Steven while the youth was repeatedly attempting to stab him again."
He added that the defendant's arrogance and contempt for others belied his age'.
liitle fuckin rat will be out in 6
