shooting had stopped. 12 minutes after security officer jesus campos was wounded and radio ed for help. in his first interview, campos telling ellen degeneres he d been sent to investigation an open door in the stairwell. as that door is closing, and it s so heavy, it will slam. i m walking down this way, and i believe that s what caught the shooter s attention. as i was walking down, i heard rapid fire. reporter: the gunman shooting through his hotel room door, hitting campos in the leg. with this new timeline, the remaining mystery is, why did stephen paddock do this? now, police tell me that he was so secretive that we may never know. david? matt gutman again tonight. thank you, matt. president trump welcoming puerto rico s governor to the white house today, four weeks after the hurricane struck. just 21% of the island has power. more than a quarter of the island still does not have