I'm putting my money on that is someone that lost their wife or child and had procedures/medicines denied and/or were financially ruined to boot.
Discussion
That would make some sense but the shooting looked well prepared.
Either professional or someone who planned for a while.
Anyone that would hire a professional can afford not to be fucked but insurance.
And most of the time when it’s a distraught person they don’t care about being caught. This guy seems to be working hard to get away with it.