From Boston.com:
Chicago police are trying to determine whether a shooting that left one man dead and another in critical condition was related to a birthday bash for former Celtic Antoine Walker. The party marking 'Toine's 32d birthday was held Sunday at a club called Excalibur, and the shooting took place about a block away at the Rock 'n' Roll McDonald's. According to the Chicago Tribune, Walker's mother, Diane, was at the party, and has told police there were no problems. But authorities are investigating whether the shooting stemmed from a fight that originated at Excalibur. Walker, who plays for the Grizzlies now, was the victim of a home invasion last year.