Clairvius Narcisse (January 2, 1922 – 1994) was a Haitian man who claimed to have been turned into a zombie by a Haitian vodou, and forced to work as a slave. The hypothesis for Narcisse's account was that he had been administered a combination of psychoactive substances (often the paralyzing pufferfish venom tetrodotoxin and the strong deliriant Datura), which rendered him helpless and seemingly dead.
https://en.wikipedia.org/wiki/Clairvius_Narcisse