Condemned Santa Clara County killer David Allen Raley has lost perhaps his last legal argument to get off California's death row for the 1985 murder of a Peninsula teenager and the attempted murder of her friend inside a deserted Hillsborough mansion. Santa Clara County Superior Court Judge Linda Clark this week rejected Raley's argument that he was mentally retarded at the time of the crime, a finding that would bar his execution under a 2002 U.S. Supreme Court ruling.