Police say a mentally ill man beat one of his roommates to death at a San Jose nursing home. A staff member at Crestwood Manor Assisted Living found the 38-year-old man bloody in his room yesterday afternoon. One of the man´s three roommates, 34-year-old Daryl Sakamoto, left the room when the staffer came in. Sakamoto jumped a fence, but police found him several blocks away in a shopping mall parking lot. Sakamoto was arrested and booked for murder. He had been staying at the home less than a week. Police say they have no motive.