A DNA test on a single hair has cast doubt on the guilt of a Texas man who was put to death 10 years ago for a liquor-store murder - an execution that went forward after then-Gov. George W. Bush's staff failed to tell him the condemned man was asking for genetic analysis of the strand.

The hair had been the only piece of physical evidence linking Claude Jones to the crime scene. But the recently completed DNA analysis found it did not belong to Jones and instead may have come from the murder victim.