Possible German serial killer tried for allegedly being a werewolf
Peter Stumpp (c. 1530–1589; name is also spelt as Peter Stube, Peter Stubbe, Peter Stübbe or Peter Stumpf) was a German farmer and alleged serial killer, accused of werewolfery, witchcraft, and cannibalism. He was known as "the Werewolf of Bedburg". Sources. The most comprehensive source on the case is a 16-page pamphlet published in London in 1590, the translation of a German print of which no copies have survived. The English pamphlet, of which two copies exist (one in the British Museum and one in the Lambeth Library), was rediscovered by occultist Montague Summers in 1920.
https://en.wikipedia.org/wiki/Peter_Stumpp