Baretta actor Robert Blake, 67, has hired an investigator to solve the murder of his wife, Bonny Lee Bakley, 45, who was shot to death Friday night near one of the couple's favorite restaurants in Studio City, Calif. Bakley reportedly believed someone had been stalking her and asked Blake to carry a gun. Meanwhile, Blake — who is not considered a suspect — was admitted to the hospital over the weekend after suffering from high blood pressure.