In Texas, DNA testing has revealed that the key evidence against a man convicted of murder and put to death by then-Gov. George W. Bush was wrong.

Claude Jones always claimed that he wasn’t the man who walked into an East Texas liquor store in 1989 and shot the owner. He professed his innocence right up until the moment he was strapped to a gurney in the Texas execution chamber and put to death on Dec. 7, 2000. His murder conviction was based on a single piece of forensic evidence recovered from the crime scene—a strand of hair—that prosecutors claimed belonged to Jones.

But DNA tests completed this week at the request of the Observer and the New York-based Innocence Project show the hair didn’t belong to Jones after all. The day before his death in December 2000, Jones asked for a stay of execution so the strand of hair could be submitted for DNA testing. He was denied by then-Gov. George W. Bush.

A decade later, the results of DNA testing not only undermine the evidence that convicted Jones, but raise the possibility that Texas executed an innocent man. The DNA tests—conducted by Mitotyping Technologies, a private lab in State College, Pa., and first reported by the Observer on Thursday—show the hair belonged to the victim of the shooting, Allen Hilzendager, the 44-year-old owner of the liquor store.