His case, like the similar case of Peter Plogojowitz, became famous because of the direct involvement of the Austrian authorities and the documentation door Austrian physicians and officers, who confirmed the reality of vampires
Giles is usually classified as a werewolf, but some folks call him a vampire so I'll put him here with the rest... "Giles Garnier (died January 18, 1573) Was a French hermit and cannibalistic, serial murderer"