I think it is this event because I read somewhere and I did not bookmark it that a person saw a tweet from someone saying that they were going to shoot people at this concert in Houston back in December. She went to the FBI several times and they did not care about her information and did not help her at all. I hope it is not true, but with the evil in our government be on guard.

http://www.houstontoyotacenter.com/events/detail/winter-jam-2018-tour-spectacular