Watched this movie early '96 late night in a hotel room so possibly was on hbo or cinemax. The only things I can remember are a person being interviewed in a jail or nuthouse using a voicebox to speak... voice was very creepy. They were talking about a chain of events that happened prior about a group of people. I believe this person was almost buried in a hole and they may have choked on their blood by what was going to be their grave. They survived and that's why they were using the voicebox?

I've been rAcking my brain for 15 yrs... please, help!