I have to search it again, obviously.
I agree that Alex's dad knows his son is involved and was on the pier. Maybe even Alex told him, how else could he know which clothes to take and burn?
Ani started ok, but as the season went on,became more and more annoying. And stupid.
Bryce was never going to change. Yes, he could try, but as we saw a few times, his temper comes out. Threatening to Zach while Alex tried to help him was low. Alex new Bryce can act on the threats.