Not only was your mother more than 5 feet away from you, she was in another room...........and you have the nerve to condemn this woman and blame her for her child's death?
My brother and I spent many an hour on the same type benches you talk about - but at least our father or grandfathter was sitting with us keeping watch. Apparently your mother was not as vigilant as mine.
I'm so sorry that you can't tell the difference between sitting quietly where we were told to stay and a child wandering off, playing.