Dead and Buried is a weird movie in that it's a zombie movie, but the zombies aren't of the brain munching variety. No, these are "manufactured" undead, and the guy making this all happen...is Grandpa Joe.
Jack Albertson plays the town's funeral director William G. Dobbs. He's a carefree, if not slightly creepy, kind of guy. His skill in making even the most busted up looking dead people look like they've never been hurt is amazing. But there's something far more sinister going on afterwards.
The town is made up of with what appears the be the most evil citizens this side of Stepford. They burn a photographer alive, bash a hitchhiker's head in with a big rock, and force hydrochloric acid up some poor schmuck's nose. The kind sheriff notices things are going wrong when the dead photographer turns into Goober at the filling station. Also, someone foolishly left their arm in the grill of his truck.
I know I'm spoiling this film, but it came out in 1981, so sue me. Seems that the crazy killing townsfolk are all undead, killing more folks so they don't have to seek outside people to fill their jobs. I'll let Dobbs tell you (and the sheriff) himself.
Creepy shit eh? I'll leave the last big spoiler for you to watch. It's a pretty damn good film in the zombie genre, and seeing the Man in Chico and the Man play this dastardly evil guy is really unsettling. Go seek it out.