The boy fell out of the tree. That is sad. Any time a child dies it's sad and I imagine his dad feels terribly now. But, how many kids have stomped off, quite of their own doing, to "run away" over some silly thing. It happens in most houses across the country that a child does this when they are young and you just don't expect something terrible to happen.

I know my son pulled this and we were frantic when we couldn't find him and all the time he was hiding on one side of our house in a spot we didn't look in and enjoyed that we couldn't find him.
Years ago, when I was a young adult we were having dinner at my parent's home and some family friends were there too. Their son was 5 and he was complaining and wanting to go home. His father told him, "well, then you better start walking because we aren't going home yet".
About 30 minutes later we were all frantically searching for the child because he disappeared. He had taken his father's words literally, and had started walking for home. Luckily he had only gotten a few blocks when a woman noticed him and stopped him. She sat down on the grass with him and told him that they would just wait for his parents to show up.
Today, nobody would do that. Nobody would sit down with a child and wait for the parents to find them...even though that's the very best thing to do if you are "lost". Instead, people get the police involved, and then CPS gets involved, and then suddenly good parents are being "investigated" or even charged with neglect.
I realize that things are different today, but children aren't. Some of them are still going to escape from the most vigilent of parents.