Side note: The main actor is from Australia. It's crazy how so many US shows use foreign actors. 

I thought they revealed he was guilty in season 1. He told his sister he was on mushrooms and killed her. Everybody says I'm wrong, but I specifically remember that part, as it had me like
His sister then said something to the effect of "you were young and made mistakes, just like all of us."
I think he's guilty, regardless of whether I remember season 1 correctly or not. But that's not important. This is a story of his redemption and him adjusting to his post-prison life