Need help with a rural thriller

A very long time ago, I walked in on my parents watching a movie (not that kind of movie, thank God).

All I saw of it was that it was set in a rural location. The main characters were at a murder scene on the front porch of an old farmhouse in the middle of nowhere. It was daylight. There were (I think) two bodies, both of them large people and their throats were very badly slit. Like heads almost off slit. I think the bodies had been there a while.

That’s all I’ve got. No actors, no plot. But something about it intrigued me. I do think it was out around the time of In The Mouth of Madness, because I had always thought that was it, until I recently watched it and did not find that scene.

Any thoughts?