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important. a 72-year-old suspect who was found dead at the scene about 12 hours later from what officials believe at this point was a self-inflicted gunshot wound. but there's more to the story. nbc news now on staining this new and exclusive surveillance video that actually shows the moment when an apparent hero helped disarm what is believed to be that suspected gunman, and then this person speaking at it with lester headlight. >> i had to believe that i was going to die. like, my life was ending here at that very moment. but something -- something amazing happened, and a miracle a...

But we're working on further. >> -- had a huge suitcase -- >> no. there were several suitcases. i can't give you the exact number, but it was in excess of ten. from the 28th. >> so he methodically just kept bringing suitcases back and forth? it's a big place, i get it, but -- >> i wish that would have happened, ma'am. absolutely wish that would have happened. [ inaudible question ] >> we don't have any evidence of that. >> do you have a working motive at this point? >> no, we don't. >> did he say one room, two? >> it was one large suite with two rooms. >> can you say what he did on the 29th? >...

Retirement community. loved to come here to vegas, a place he enjoyed. so successful, no outward ideology and at least according to his brother just a couple of weeks ago made a phone call like any of us might make to check on his mom who had lost power in one of the hurricanes. question remains here, why. >> exactly. chris, stay with me, go to matthew on the question of why. put in context what the authorities just said, it's early yet. but for the very reasons that chris just outlined. lack of pattern or profile, no working motive here. >> that's the difficulty oftentimes with these events. ...

The working motive for this at this point is absolute madness. we've not found any provocation, any motivation we can put our finger on. it's all speculation at this point. [ inaudible question ] absolutely. at this point he was only tar t targeted because he's wearing a uniform. there's not many civilian occupations you can do where you're shot for what you wear. [ inaudible question ] we're not taking anybody in to custody. we have people we're talking to trying to follow through methodically. we don't want people jumping to conclusions. we want to take the steps in the proper order and foll...

That's what the indications we have right now. >> no apparent reason? >> no apparent reason at all. i have no words for what this type of person did. the callousness is much. >> will carr is following this story from our west coast newsroom. hi, will. >> hi, julie. authorities in harris county, texas, are on the hunt for the man they say gunned down one of their own. they released this surveillance picture. take a look at the man they say walked up behind harris county deputy darren goforth who just finished fill up his car with gas and shooting him in the head and the back. and he fell to the...