By Zesha Saleem A teenager who jumped out of a taxi to chase and stab a schoolboy has been convicted of murder, according to the Metropolitan Police. The 17-year-old, who was 16 at the time of the attack on May 5, was found guilty by a jury at London’s Snaresbrook Crown Court on Friday of murdering Renell Charles. Unable to be named because of his age, the teenager was also found guilty of having possession of a knife. The victim, 16-year-old Renell, was a pupil as Kelmscott School in in Walthamstow, East London. He was killed shortly after the end of the school day in what police described as…