Family members are investigating what they consider to be suspicious circumstances surrounding the death of a nursing home patient at the center of a life and death tug-of-war reminiscent of the Terri Schiavo tragedy. Seventy-nine-year-old Jimmy Chambers died in the early morning hours of Oct. 24 after the tracheotomy tubes that deliver oxygen from a ventilator to a hole in his neck became unhooked. Family members were told Chambers, a resident of the Anne Maria Rehabilitation and Nursing Center in North Augusta, S.C., apparently pulled the interlocking tubes apart. "We're having it investigated. We're just incredulous," Chambers' daughter, Deanna Potter,...