article_snippet: It came after Home Secretary Theresa May was called to the House of Commons to give an urgent statement on the terror threat in the wake of last week's revelation that the ISIS executioner known as 'Jihadi John' was the London-raised university graduate Mohammed Emwazi.
article_snippet: A man thought to be Jihadi John (front black headscarf holding rifle) proclaims allegiance to a terror group in footage filmed in 2013 .
article_snippet: ISIS executioner 'Jihadi John' - Mohammed Emwazi - was pictured in 2009 when he worked for an IT company in Kuwait . '