1. The first child abuse case was Mary Ellen Wilson. Read more here: https://hubpages.com/family/Mary-Ellen-Wilson-Americas-First-Child-Abuse-Case
2. One of the youngest serial killers in history is Mary Bell. What's even more freaky? She's still alive! Her story may not be appropriate for some younger kids, so ask your parents before you look her up. I will not provide the link, however.
Do you have any facts? Add them below.