I can't believe that he didn't try to take on his dad sooner knowing how he was.. letting your father treat someone like that, the way I see it you're a coward and an accomplished. You might as well killed Sandy as well.
First of all your 16 or 17 years old, your almost 18 years old. And just choosing to turn the other cheek I'm sorry for what you had to go through as a kid, your entire childhood. But choosing to stay with him keeping his secrets after so many years. Sure trauma can do so much damage.
You should have fought him or at least escaped from how sooner, you weren't kept in chains.. for god sake. DO SOMETHING.. but no you were simply scared and traumatized which is understandable to a certain point, except referring to yourself as a kid and choosing to live with your father until your 23.
So many choices yet all you chose was the selfish ones. And those choices could have saved a life and perhaps more. Who knows what his father continues with...
Guess will never know.
I had so much empathy in the beginning of this story, but it all changed. Poor families for knowing you simply stood there feeling scared for yourself knowing someone was about to die.. and you said NOTHING.
Shame.