I watched I am a killer on netflix and the one story was based around a man who was abused etc up until he was eventually adopted by a man who was some sort of teacher, very respected in the community. Turns out he was also an abuser of children who were adopted or fostered by him. He found a photograph in the man's drawer of him holding a child's nether regions and took it to the police who ignored it. The boy went to visit his adopted parents who he adored and ended up stabbing them both to death and has never been able to explain why. In court, none of his abuse was ever mentioned and he got sentenced to the death penalty which I found really unfair given the trauma he had been through his entire life. The adopted father ended up passing away 2 years later as a paedophile but police never even got involved. I don't agree with the death penalty in cases like this at all.