This is one of two. As theories go conspiracy is pretty plausible in this case. Unless you’re just naive about how the world works.
But hey I guess they did some kind of mind control on him.
Which path would you choose if for instance you were told by an external power that your relatives might die in an accident soon if you don't kill yourself in the next 24h?
Having said that gut feeling is not evidence.
We can just make things up and that's our reality these days. Write your own adventure.
Imagine if we made it harder for mentally unwell people to own firearms and required serial transfer databases. If he never owned a gun and was then found shot in the temple one day that'd be a bit more questionable. The gun most likely to end your life in the US is your own gun in your own hands.