All(?) Of the possibilities

I still dont have much confidence in a prediction but here is my attempt at outlining all known plausible suspects:

1. accidental death. We did hear mention of a heart concern for Floyd. So maybe the death was just a heart attack, maybe during a tense argument, with the drugs in his system not helping.

2. suicide. Floyd could have been so angry at Clark that he engineered a plot to frame him for what would be seen as his murder.

3. Clark. Seems unlikely since it would mean that the twist would be that there isnt a twist. But there was obvious bad blood there.

4. Carol. Seems too obvious of a possibility, if she wanted out of the marriage, and figured she could set Clark up as the fall person.

5. Eimy. If she finds out about the affair she could kill Floyd to set Clark up as punishment.

6. Carol + Eimy. It is talked about. Maybe the wives figured they could get rid of both of their problematic husbands.

7. Richard. The son is kinda creepy and does not like Floyd.

8. Peter Sarsgaard's character. Because you arent bringing in Sarsgaard for a minor role. There might be a lot more backstory between him and Floyd.

Personally, I lean toward 8. I think we have several twists to go.