Some have commented on a note that was caught in a police photograph after law enforcement breached the door of Stephen Paddock’s suite on the 32nd floor of the Mandalay Bay Resort and Casino. The 64-year-old used his room as a vantage point to open fire upon the 22,000 concertgoers attending the final night of the Route 91 Harvest festival. He killed 58 people. He wounded at least 400+ more. It was a senseless attack and one in which we don’t know the motive. He was independently wealthy, a heavy gambler, with no known mental health history, or any run-ins with the law. He purchased all of his firearms legally. He passed background checks.

What set this guy off to bring 23 firearms into a hotel room, rig a surveillance system outside of his room, and open fire and kill scores of people? Did that note have any clues? No. It was merely a calculation of how to maximize the lethality of his attack, according to CBS News. "60 Minutes" interviewed the officers who stormed his room. Paddock had already killed himself: