Completely understand how you and your son feel about this. It is very tragic and a as you said, he was far to young to pass. On the other hand, people on the outside (even people close to the tragedy), need to question the actions of the individual. If no one does, then it is seen as acceptable behavior and no one will learn from the tragedy.
Here in Montreal, a young woman lost both her legs after being run over by a train. How could that happen one asks? Because, she was trespassing and walking through a rail yard. She was taking a shortcut to get to another road, instead of taking the long way around. When the story came out in the news, two camps of people immediately formed: one camp that mollycoddled her and the other camp said sorry, but rebuked her nonetheless. Which camp was i in? The one that rebuked her. Why did i rebuke her? Because, if no one did, she would think that what happened to her was none of her fault. This leads me to another tragedy that occurred in Montreal.
Some years ago, a couple of young boys decided to go inside of a tunnel where freight and passenger trains pass through. Not only were they trespassing, but they were also vandalizing the tunnel with spray paint. Unfortunately for them, a Via train came through the tunnel and hit the lot of them, killing them all. Now, keep these points in mind: they trespassed and they were vandalizing private property. Guess who the parents blamed for their deaths? The train company. I will tell you right now that the family was put straight, real fast by the public.
It about taking responsibility for your own actions and not taking the easy way out and blaming someone else.
Stay away from train tracks and trains. You will not win if one bites you.