which is odd. talk to me about this crime scene. it's a huge crime scene. you have essentially the las vegas strip and very big concert venue. these are live pictures right now. >> you're going to have his house, his cars, and this park where it is going to be a huge undertaking. all the ballistics have to be recovered from. any other information they are going to have to find, they have to coordinate a crime scene search. they will have to create a grid pattern to they don't miss anything. they will have to flag all the pieces of evidence they do find. and evidence at the hospital where some of these victims unfortunately have passed away now. they will have to go is and collect those things too. this is a huge under taking for any police department. but this one is going to be extremely difficult to deal with because of the amount of people that have been killed. >> investigators like you always try to figure out what this is, what the motivation was. is this terrorism? isn't it domestic terrorism, something that rains terror down