We also had a five year old molested by a twelve year old. They were sitting at the same computer, as the kids very often do, and the staff thought they were brothers. Finally the five year old got up and told his mother, the twelve year old had gone into the little boys' room. When he came out he was identified and ended up in juvenile custody.

The five year old was frightened and so didn't do anything that would have caused the staff to move in. No, they didn't know each other.

This was before the security cameras.