I have narrowed it down to three.
Cameron Mason- His panick attacks allow him space from others and can cause him to lash out, making it easier to kill.
Breckin- He has seemed suspicious many times and he was the last one besides Cam to be awake when my character died. He could have easiily done it.
Elliot- Even though him and my character had a relationship he didn't react strongly to the death and he seems distant. I don't know if I trust his character.
Right now I think my guesses go Elliot, Breckin, and then Cameron. #DarkDaysS1