"Zombi..Spirit of the dead."

The idea of zombies originated from the Voodoo culture in Haiti. This site offers a better understanding of a "Zombi" -Haitina for "spirit of the dead." It also explains how "coup padre" is administered on a victim. The Haitian "Zombi" is very different than the one's most people are used to. Haitain folklore says a zombie is a "mindless drone" enslaved under the dark magic of a "Bokor." So how did zombies become canibalistic monsters?