As fa as I see it, no gun in house, no gun accidentally in child's possession, no sister shot.
You could argue that he could have found a gun another way, but somehow I doubt that there'd be that much effort put in by the kid.
One quick squeeze of a trigger does a lot more damage than one stab.
One quick swipe with a sharp kitchen knife across the throat is all it takes to bleed a person to death. The human body is actually quite fragile and has a number of places where a single stab or slash can result in death.
Psychologically, it's far easier to fire a gun to kill someone than to use a knife to kill someone.
If you're pissed off a single slash of a knife might be just as easy as pulling a trigger. In this case we've got an irrational 10 year old who seems to have been having a bit of a tantrum.
No, that's not true. Firing a gun is indirect, and can be done from a distance; using a knife is quite direct. See, for instance,
proximity's influences on conformity.
I think I had something else to say on the topic, but unfortunately my train of thought got derailed by a phone call
