Police have released shocking CCTV footage of an elderly woman being knocked to the ground and injured by a man fleeing a supermarket shoplifting incident. br br The footage shows the suspected offender barging into an 81-year-old woman as he runs down the street, chased by a security guard from a Marks & Spencer store. br br The woman, who appears to hit her head against a shop window as she falls, suffered a broken wrist and bruising. br br The thief grabbed food from Marks & Spencer in The Horsefair, Bristol just after 12.30pm on Thursday, October 26.