coming in tonight, the first time its ever been seen, from after the las vegas massacre. you will see and hear the moment they stormed the hotel room on the 32nd floor. images showing the moment police breach stephen paddock's hotel room. 58 people were killed, nearly 500 wounded. abc's chief national correspondent matt gutman has the video just released. >> reporter: the new video shows the s.w.a.t. team clustered in the hallway outside the sniper's room, no sense of what they'll find when they blow down the door. >> breach, breach, breach. >> reporter: that deafening explosion. one officer's body camera then revealing the moment he spots stephen paddock's own surveillance camera hidden on the service cart. >> looks like there might be a camera of some sort. >> reporter: the officers gingerly entering the hotel suite -- >> okay, cover on that. in with you. with you, with you. >> reporter: -- of the deadliest mass shooter in u.s. history. the team surveying the scene, those high-powered rifles resting on a chair. 23 guns ultimately found. thousands of rounds of