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Criminal investigative decision. and sam roboti, retired agent in charge of the atf in philadelphia. art, you first. we keep getting lots of information, especially coming from these press briefings. law enforcement officials who have been briefed on this investigation told cnn on thursday that they had no knowledge of an accomplice for paddock. but then when you see sheriff lombardi in there saying we have to assume he had some help, is this a difference in terms of terminology, help versus knowing accomplice? >> it could be but it's almost like the sheriff is dropping hints. he dropped hints...

From the sheriff here and i think we're seeing just the tip of the iceberg and i doubt very seriously if the fbi is going to tell him anything they don't want leaked out to the press. i think they know that he's a pretty quick conduit out to the press. but i believe the fbi knows a lot more than what's coming out right now. i think they have a pretty good sense of the motive and a lot of his movements and some of the things that have gone on over the last couple of months. >> hey, chris, before i get to sam, i mean, what are the odds that you have, you know, someone with the same name checking...

There. your typical collectors are the types of folks who would be able to purchase this many long guns and use them for resale and profit. an video not a collector and amassing this many types of firearms is not somebody i would describe as a collector and probably had some other motivations. >> sam, everyone has heard this video, it's a heartwrenching video of the rapid fire from the gun, coming from his weapon, the pause then fire and everyone says it sounds like automatic fire. no way is that a semiautomatic. i don't want you to broadcast anything, but is it that easy to convert a semiauto...

Information. >> over and over again to be sure. thank you so much. really appreciate it. joining me now to discuss all of the latest and what still remains many questions regarding this investigation, sam roboti a atf special agent, john white a forensic psychologist and jonathan whacker former secret service agent under probe. james gaglano is a law enforcement analyst and retired fbi to special agent. it's great to have you here. thank you for being here. sam, first to you, the arsenal that this guy pulled together that dan simon laid out, 23 guns in his hotel room, thousands of rounds of ...