In a videotape secretly recorded in prison, the late mass murderer Richard Speck strips off his jumpsuit to reveal women's blue underwear. Along with another inmate, he snorts what appears to be cocaine, engages in sex acts and tells the camera how he's had the time of his life behind bars. "If they only knew how much fun I was having in here, they would turn me loose," Speck says. The videotape, portions of which began airing last week on Chicago's WBBM-TV, shows no contrition from the man who murdered eight student nurses nearly 30 years ago. Speck died of a heart attack in 1991.