Looks random?
Nope. Random means this could happen anywhere. It happened there, at the Cascade Mall, not any mall in Washington state. It happened now, not before or after whatever drove this punk to act. Let's see why? Admittedly, similar dynamics may exist anywhere, whatever those may turn out to be. Thank you sleuthers for being here posting information. Just such a sense of regret, I guess, that this goes on. I hope nobody else gets hurt by him.