When Cooper was born, his mum died from sickness when he was only a few months old, and his father took it out on him all his childhood, as if it was his fault. But then when he was 18, he had enough of all the abuse and fights in their home, which is meant to be happy and filled with love he realised after witnessing other familys, and he killed his dad out of the bottled up emotions. And well, it turns out he had a lot of serious mental issues, and that's why he's here instead of prison.