Down Paddock News Today

>> reporter: sheehan believes if paddock escaped, it wouldnt have been for very long. >> theres one of three ways its going to end for an active shooter. you either commit suicide, die in a hail of gunfire with the police, youre going to shoot it out with them and youre going to be killed or youre going to continue on a preplanned rampage at locations b, c, d and e until the police finally stop you. >> reporter: so you dont mean escape meant escape for good? >> how could it? he rented the room i...

From the gunmans and got inside information about his planning from a former s.w.a.t. team member. stephen paddocks horrific attack on the route 91 country music festival was a very meticulously planned assault. >> he spent decades acquiring ammo and weapons and living a secret life. >> reporter: that planning, experts say, began with a snipers nest that he chose at the mandalay bay and the targets below. k from the room, you can see paddocks broken hotel window, his line of sight to the concert...

Behind this curtain, one of the two windows that paddock shattered for two different firing positions. in addition to the concert, paddock may have had a second target. the las vegas review journal reporting that he fired at two jet fuel tanks roughly 1,000 feet past the concert goers, hitting one tank but not causing a potentially massive explosion. as investigators tried to nail down paddocks motive, they are learning more about what he did before the attack. he rented a condo in this building...

Approxima32nd floor. >> reporter: even though paddock stopped firing on the crowd, hes convinced paddock didnt immediately kill himself. instead, he focused on escaping. >> he was doing everything possible to figure out how to escape at that point. his concern was personal concern versus what was occurring down below him. >> reporter: paddock had an even more sophisticated system than first thought to alert him to anyone approaching. two surveillance cameras on this room service cart along with ...