Chrisdian Johnson, 22, knifed Oluwaseyi "Seyi" Ogunyemi, 16, seven times for straying on to his "turf".

Chrisdian Johnson, 22, knifed Oluwaseyi "Seyi" Ogunyemi, 16, seven times for straying on to his "turf".Sentencing Johnson to a minimum 24 years for murder yesterday, Judge Christopher Moss QC said: "Gang violence will not be tolerated."Johnson, of Vauxhall, South London, was caught after police traced the Staffordshire pitbull cross Tyson from its DNA. Johnson was also jailed for 20 years, to be served at the same time, for trying to murder Hurui Hiyabu, 17, who was stabbed nine times but survived.As Johnson was led down at the Old Bailey, he blustered to family: "Cool man".
Judge Moss also ordered the dog be forfeited and it now faces being put down.