22-year-old Karl Bishop was found guilty on March 4, 2009 of murdering 18-year-old actor Rob Knox in May, 2008 by stabbing him to death outside a bar in London. Five other were people injured in the attack. On March 5, 2009, Bishop was sentenced to a minimum 20 years in jail.The Guardian: Man found guilty of murdering Harry Potter actor (March 4, 2009)Herald: Karl Bishop, who stabbed... (March 5, 2009) Knox had a minor role in the upcoming movie Harry Potter and the Half-Blood Prince.
Rob Knox
18-year-old actor Rob Knox died just days after filming his last scenes for the upcoming movie Harry Potter and the Half-Blood Prince. Knox played Ravenclaw student Marcus Belby in the film, which will be released in the summer of 2009.