I think all of this speculation here is due to boredom & waiting out the release. The Josy Maya revelation was a surprise because there was no indications that I saw that said they were in a relationship with each other. So to think that there's a chance that the culprit can't be anyone until it's revealed is wasted effort.
James can be dead or alive. There's no hard evidence any way. Same with who MC is related to. There's been nothing to this point that says he's related to Rusty. Or anyone for that matter. The house that Jill's parents live in isn't confirmed to have been MC's mother's house. I may be wrong there but I thought they just said they bought it from a friend.
All of these theories & speculations will be revealed eventually (perhaps). And then we can go back to see what foreshadowing DPC added before the grand reveal. If any.
There's a total of 4 prominent non-white characters in this game. Two are essentially prostitutes, one is a stripper & the 4th can't just be a guy, he has to be a traitor. Very interesting.