He left in his hotel suite. Reportedly it was just a series of numbers. So far no major clues about motivation at least that may have been made public. He may have been casing other locations in other cities before the Las Vegas Massacre on sunday cnn learned he tried to buy tracer bullets but failed that would have allowed him to see what he was shooting at. And honoring charleston hartfield, the offduty Las Vegas Police officer. We start with jean casarez. Good morning, jean. Reporter good morning, poppy. As you are saying, Law Enforcement is not saying anything about motive, why this killer did what he did. The fbi tells cnn they have hundreds of people working on the investigation at this point. Meanwhile, harrowing video now released from the scene as the bullets were coming. We want to worn you this may be very disturbing. Who is the gun with gunshots . He is. He has a shell casing in his arm. Reporter civilians racing to save the wounded in this heartwrenching video minutes afte