'Jihadi John': Quiet football fan who became the symbol of Islamic State

'Jihadi John'

From a quiet, football loving child to an Islamic State executioner, the man who became one of the most haunting figures of the jihadist movement remains a mystery even after being the high-profile target a US air strike.

Born Mohammed Emwazi, the masked Brit who became known as "Jihadi John" sparked worldwide revulsion with his grisly executions of foreign aid workers and journalists in Syria on camera.