Who Slew Simon Thaddeus Mulberry Pew?

"Twins Sammy and Tammy Fitzgivens are forced to play with their bratty neighbor, Simon Thaddeus Mulberry Pew (John Kassir), but all they really like about him are his toys. The siblings devise a clever way to steal them but unfortunately, the plan backfires and Simon ends up dead. Adding to the already surreal atmosphere is The Wizzit (Armin Shimerman), who shows up just in time to help the kids stash the body."