Normally, incidents like these will drastically alter a child's development. Often they'll become violent offenders themselves when they reach maturity. But this case is particularly interesting in that the child didn't react emotionally to the death of his mother, nor did he start panicking after he was stabbed. Maybe he's more resilient to trauma than most people. With any luck he won't end up the way so many other traumatized children do.
And what the heck was the father thinking when he flagged down a fire truck? Must be crazy AND dumb. Hopefully his son doesn't take after him.