This is something that I have thought a lot about. Ever since I read that Jeffrey Dahmer was hit in the head when he was young by a 2by4. I don't know if that particular story was true, but I do know that the brain damage angle is a real thing. I have a huge wish and prayer that the scientific community would study this more. If there was some way to prevent these people from turning into monsters that would save so many innocent future victims. I do believe that TH was born a person, a little child. Something went wrong and I believe it is in the brain--even if it was caused by poor parenting, drug use, a chemical imbalance, a brain tumor, or a whack to the head. Something is wrong in that person's brain.
I know people often get upset whenever you think about a genetic or medical "reason" for these crimes, because it seems like one is denying the existence of evil and not holding perpetrators accountable--but the ultimate goal should be saving lives and maybe there is an important key to that in science. I'm not at all denying the outrage or horror at the evil perpetrated here, nor am I trying to elicit pity for the perp. It's just something I think about a lot. I wonder if in 100 years we will understand what is going on better, the way we now understand that sickness is caused by germs and diseases and not evil spirits and look back at this time at how sad and preventable it all was--if only we knew! JMO