Sorry I got distracted by something. Anyway don't read if you do not wish to possibly ruin the game for yourself.
So after reviewing all the bad endings and up to date content, I believe that "Roswell" is the one behind the events, at least at one point in time. I went back to study all the deaths and out of all of them so far, Dean is the only one who suffers. He gets poisoned, Sal is frozen, Roswell is hit from behind, (possibly could've suffered) Hoss is stabbed in the chest, Orlando was injected, (?) Tyson could've suffered as well but we don't know if he died right away or not. Who could possibly have a grudge against Dean? Well, I don't want to spoil too much so I'll say; read through the game and try to put it together.๐๐๐๐๐๐๐๐
Edit: Let me know what you guys think. ๐ค๐ค