Do I believe in Zombies?

 Most certainly

The first thing to clear up is the definition of a zombie. Forget the image created by George Romero, and the film makers that followed, their defnition is nothing like a zombie.

I do believe zombies exist, though I have not met one; there is a documented case in Haiti of a man who was put in a state of being a zombie; he lived for two decades as a normal person, when he finally was rid of the curse he had no idea what had happened during the 20 years.