Adelaide star forward Taylor Walker was a no show at Crows training on Thursday, after allegations emerged this week that he directed a racial slur towards an Aboriginal player from an opposing side in a reserves game last month. It is alleged that Walker, who was a spectator during a SANFL game between the Adelaide Crows and North Adelaide, attended a quarter-time huddle and directed a racial slur towards Narungga and Ngarrindjeri man, Robbie Young who played for the opposing side. Since the allegations emerged this week, the AFL's Integrity Unit has started an investigation into the alleged incident, which occurred at Prospect Oval on July 17.