Wow, what a find. James Caan in a supporting role in 1990, still with the power to untether Sonny Corleone on demand, but mostly genial. Kathy Bates stars, is awesome, and deservedly got an Oscar. Written by Stephen King, It's a bit of The Shining, Twin Peaks, Fargo, Sleuth and many other things. IMDB's summary doesn't do it justice; it's hilarious and a bit scary. I see now that director Rob Reiner has great form.
The Sheriff, apropos his deputy/wife: "You see, it's just that kind of sarcasm that's givin' our marriage real spice."