Very sad & tragic...but I'd cut the 13 y.o. a little slack. He probably panicked and headed for the only safe haven he could think of - mom and dad. Granted, that was not the "best" choice, but understandable given his age. I remember being his age and throwing a rock and hitting a classmate and before I even quite knew what I was doing, I had run home in a panic(scared s***less of my teacher). My folks made me do the right thing. I hope his folks do too.
I dunno. If he is that irresponsible at 13 years of age his parents should not have allowed him to be out alone in a boat.