So I had a very weird dream, what would you do?

I have very vivid detailed dreams, and the one I had last night proposed a moral question. Basically I was a landlord of some sorts and in the matter of two nights 4 of my friends/tenants were stabbed or shot in their sleep. To make a long story short, through my own investigation I found out that the killer was a four year old boy. He admitted it all to me and also gave me the murder weapons. His story was sad, he was left by his mother in the apartment months ago and she had also made him try cocaine when she was taking care of him. In the dream, much to my friends’ chagrin I refused to press charges, but found the mom and told her he needed psychiatric help and rehab. I woke up and it made me wonder, what would a verdict be for a 4 year old serial murderer? Could they charge him? Would the mother be held accountable? Would you press charges?