Moment stranger approaches Saudi student and stabs him

This is the moment a man stabbed a young Saudi Arabian student in Cambridge during a late-night altercation outside a luxury accommodation block last year.Footage caught on CCTV shows Chas Corrigan, 22, reaching into a pocket of his shorts where he had a knife that was used on Mohammed Algasim, 20.The student was stabbed in the neck and collapsed a short distance away after running from the spot.Corrigan is currently on trial for murder and the jury has heard that he admits taking Mr Algasim's life but claims it was in self-defence as he feared he was going to be attacked.