Horrible tragedy ... really hits home for me as I have 7 year old son who I am teaching the rules of firearm safety to, with his BB gun as he accompanies me on trips to the range. We are just getting ready to move up to a .22, as his safety has been demonstrated to me for over a year now.
It never hurts to have a tragic reminder to keep you own personal situational awareness & adherence to the rules proficient, and avoid complacency. I am very cautious but as a reminder to myself to be safe when I am so focused on teaching him safe handling & drilling him the 4 rules.
I have on a couple of occaissions seen unsafe behavior at the range, competitions several times and I have always corrected the individual(s).
More recently, a gentleman who I compete with was shot in the abdomen by a .45 JHP in his home by a ND from a friend mishandling a carry firearm. I have never observed him mishandle a firearm after numerous times in competition once. He had to have a portion of his colon removed, lost 50 lbs and was out of work for 6 months. The friend was an 'experienced shooter' who 'cleared' the firearm incorrectly, and was placing it into a pistol case when he had a ND & it riccocheted off a heavy workbench and into the gentleman's abdomen. Thankfully, the gentleman has made a mostly complete recovery --- but I tell this story only to illustrate that this happens to guys like us. You cannot control the actions of others, but you need to have your brain engaged at all times.