Mystery surrounds death of American doctor in Puerto Vallarta

William Thomas O'Byrne III, 54, died Wednesday at UAB Hospital where he had been on life support after he was flown back to the United States from Puerto Vallarta, Mexico. O'Byrne was an anesthesiologist who specialized in critical care.

Dr. O'Byrne was vacationing in the Pacific Coast resort town with friends when they say he was separated from the group. Conflicting reports say friends found Dr. O'Byrne in a ditch, while other reports say friends found him in a coma at a local hospital.

UAB officials provided only this statement: "At the request of the family . . .

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