Usually when an event seems really shady is when there's enough Panic that the federal government is finally allowed to pass some law that gives them ultimate power, bypassing constitutional rights, that they could have never otherwise passed without such a crisis and a tragedy. Kind of like the passage of the Patriot Act, which had been written and developed 10 years earlier, but there had never been the political will to pass it until a major event which was 9/11.
The passage of NDAA.
If you see a new law being touted, look closely. Also, watch the media, see what they are doing with the story, are they all selling fear, fear, fear? If they are, look closely.
Remember Sands Hook and that huge push to ban semi auto rifles?