We know who killed Billy the Kid, but who killed Pat Garrett?

"SANTA FE, New Mexico -- The showdown between frontier lawman Pat Garrett and notorious outlaw Billy the Kid has fascinated the American public for nearly 130 years with its classic, Old West storyline.

As it turns out, the feud isn't completely over.

New Mexico Gov. Bill Richardson is considering granting a posthumous pardon to Billy the Kid, angering descendants of Garrett who call it an insult to recognize such a violent outlaw."