Ex-Power Ranger pleads guilty to killing roommate with sword

LANCASTER, Calif. — A former "Power Rangers" TV actor has pleaded guilty to killing his roommate, who was stabbed to death with a sword.Thirty-eight-year-old Ricardo Medina entered a plea Thursday in Los Angeles County Superior Court to voluntary manslaughter with the use of a sword. He faces six years in state prison.Prosecutors say Medina stabbed Joshua Sutter several times in the abdomen two years ago at their house in Green Valley, a mountain town north of Los Angeles.The two had argue