This is the horrifying moment a teen killer stabs a 14-year-old boy to death with a massive sword before fleeing the scene.
Today, Marques Walker was jailed for life with a minimum of 19 years after he confessed to murdering defenceless Jermaine Cools.
Aged just 16 at the time, Walker stabbed the "happy and smiling" boy after a fight broke out near West Croydon railway station, in south London, on November 18, 2021.