A music executive who was critically injured by a gunman who opened fire Friday on passing motorists in Hollywood has died of the gunshot wounds he sustained, Los Angeles police said. Music and real estate executive John Atterberry was driving near Sunset Boulevard and Vine Street when he was blasted three times in the face and neck by the gunman, later identified by authorities as Tyler Brehm, 26. Brehm began firing a .40-caliber handgun at motorists, police said. He shot Atterberry's silver Mercedes-Benz coupe.