Matthew Lillard and Skeet Ulrich Debunk Longtime 'Scream' Death Theory: 'No One Knows'

Matthew Lillard and Skeet Ulrich addressed one of the long-standing mysteries in the "Scream" franchise Saturday: Who was in the Ghostface costume when Tatum Riley (Rose McGowan) was killed? During the "Scream" 30th reunion panel at Midsummer Scream in Long Beach, Calif., Lillard and Ulrich, who played knife-wielding best friends Stu Macher and Billy Loomis, respectively, in Wes Craven's "Scream," were asked point-blank if they knew who was responsible for the fan-favorite character's brutal slaying. Their answer? "To be honest, not even [screenwriter] Kevin Williamson knows . . .