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So something may be really insignificant now but be hugely significant a week from now. >> that's pretty interesting. and tom, what's your take on that? i know you're seeing even if there's not dna, there's not fingerprints, there's other things. don is talking about the wire fingerprint. >> don is exactly right. there are so many different little pieces that could be significant later. actually, going back to drew griffin's point about some of the lack of information, the authorities will not put out more than they need to in a case like this for many reasons. one is from experience, a lot of...

Microscope because it leaves very small, unique marks. so they may be able to trace a particular tool to a particular piece of wire. so something may be really insignificant now but be hugely significant a week from now. >> that's pretty interesting. and tom, what's your take on that? i know you're seeing even if there's not dna, there's not fingerprints, there's other things. don is talking about the wire fingerprint. >> don is exactly right. there are so many different little pieces that could be significant later. actually, going back to drew griffin's point about some of the lack of inform...

Compare those pellets with the pellets that were found on the scene that were pulled out of people's legs and so forth, and then they'll compare those pellets to -- they'll take them to the laboratory and the fbi laboratory, the tdac where they analyze all these bombs. they've cataloged so much of these stuff where they've compared it with other devices, so they'll look and see if these pellets or ball bearings match other devices. maybe they can figure out where they were manufactured, too, and then start that whole process over again. >> don barelli, thank you very much. as we said, former m...

Frustrated this early in the game, but i will tell you, they are in a real urgent hunt to find this person and solve this crime. >> certainly the first 24 or 48 hours, so crucial in that. thanks to drew. let's talk about what authorities can learn from this new evidence. i want to bring in the former fbi assistant director tom fuentes, and don barelli, cfo of the firm that specializes in security and counterterrorism. tom, we'll start with you. we obviously have these photos. how significant is that for the fbi? you see the underwriters laboratories logo on some of those, you see serial number...

Intensive, important investigation like this, so that's another issue of the type of information getting put out. >> don, let me ask you about the pictures we've been showing here of the before and after, of the light-colored bag next to a mailbox and then afterwards, we've shown the blurred picture where the bag is gone. obviously it's blurred because people are injured. but one thing that we noticed from this is the mailbox doesn't appear to be damaged. that was leaning against a mailbox. does that mean that bag is taken out of consideration? >> i don't think anything is taken out of conside...