Jail for the alleyway killer

A teenager who knifed his victim to death with a 20cm-long kitchen knife after he was caught on CCTV trying to steal his mountain bike and rucksack was jailed for at least 22 years. Shackim Purnell-Taylor, 19, stabbed 22-year-old Leo Marcus in the heart after ambushing him in an alleyway in Woolwich, southeast London on 10 July last year. Mr Marcus refused to hand over his rucksack and mountain bike and managed to wrestle the thief to the ground. But…