Police listened in as gangster bragged how he would get away with murdering this teen

A teenage gangster who was recorded by police as he rapped about how lucky he was not to caught on CCTV murdering a schoolboy at a train station is facing a life sentence. The 17-year-old, who cannot be named, stabbed Louis Johnson, 16, with a ferocious 15cm ‘Zombie knife’ at East Croydon station. He was warned by police that any phone calls he made in custody could be recorded. But he could not resist telling a friend over the phone:…