Mohammed - Jihadi John - acquitted Emwazi pleaded guilty to possession of stolen bicycles in 2012 . Brother Omar of same charge weeks before . Mohammed - Jihadi John - acquitted revealed as part of street preaching group called Power of Dawah . Group supports fundamentalist preacher Abdur Raheem Green . Green previously linked to al-Qaeda 's failed 'Underpants Bomber '
Omar Emwazi pleaded guilty to possession of stolen bicycles in 2012 . Brother Mohammed - Jihadi John - acquitted of same charge weeks before . Omar revealed as part of street preaching group called Power of Dawah . Group supports fundamentalist preacher Abdur Raheem Green . Green previously linked to al-Qaeda 's failed 'Underpants Bomber '