I don't know enough about the shooter's background to pronounce him a sociopath. He didn't seem to have a hx of much, based on what I've read. This sort of more bears the hallmarks of some sort of mental breakdown and or PTSD event leading to a planned, "End it all" type of thing. It's arguably true that making and enacting such a plan (which was clearly thought out) are sociopathic acts, but to be a sociopath one really has to have that going on over the lifetime of a person. IDK if that's true, for this guy.
I don't think this needs to turn into an argument over guns. Don't get me wrong, the media goes there at every opportunity, and I'm not certain such modifications should be legal, but if they're illegal they will still be readily obtainable. I do get a bit tired of the gun control rhetoric being trotted out at every mass shooting. Guns aren't going to be banned in American anytime soon, IMO. The continued "We need gun control" thing that gets trotted out is either the media not really knowing what else to "report/commentate" on or there to raise ratings. I think it's often disrespectful to the situation, honestly. "Let's talk about gun control while emotions are running high...." Doesn't get anything accomplished, and really just distracts from the real focus of the tragedy.
I am not saying there isn't a place for gun control debate, but using these tragedies as a platform for doing so is disrespectful, IMO. Also this guy was clearly bent on carrying out this plan, if you can do what he did, I'm sure you can get your hands on a bunch of illegal firearms. It's not exactly
difficult, I'm fairly certain I could do so myself but I have no desire/need to do so. When you get to the point that this person got to (whatever his reasons) legal/illegal isn't going to make much difference here.
EVERYONE would agree that this guy shouldn't have had access to weapons, but we often only ever know this after the fact, and "Monday morning quarterbacking" is that the phrase? Only leads to a lot of arguing, and lack of focus on the more important parts of what has happened.

Maybe the government will prove me wrong and try to do... something, but I'm doubtful on the matter. Just my thoughts, as always.
Anna