(Undated)  --  A 93-year-old Oregon man says he's not giving up on his quest to prove the existence of Bigfoot and Yeti.  Peter Byrne even got the FBI to analyze hair samples back in 1976, internal Bureau memos show.  Turns out, the hair belonged to a very non-mythical deer.  Byrne says he's been searching for evidence of the creatures since 1946, both here and high in the Himalayas.  Byrne says he's been fascinated with these stories since he was a child.