CCTV shows the moments before a Saudi student was fatally stabbed in the neck by a stranger as he sat with friends outside his university accommodation. Mohammed Algasim, 20, died of a single stab wound across his jugular vein after an altercation on the evening of 1 August last year. Chas Corrigan, 22, who denies murder and is on trial at Cambridge Crown Court, is seen in CCTV approaching the student and his friends as they sit on a low wall. Abdullah Bin Shuail, one of Mr Algasim's fellow