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-- in general and I want to bring in Kevin miles who's a former bomb technician.
With the FBI only left the the FBI two months ago my apologies for teasing you is Kevin where it's that kind of day Kevin.
But you this was your business for years Willis.
Making bombs to help the FBI.
Deconstructing -- trying to figure out from a bomb fragments who was behind the act that's -- for some skate your reaction to what we've seen so far the past hour twenty minutes well.
If that's the case if this actually true I think it's wonderful news is great news -- -- arrested he's off the street.
And it's also I might -- par for the course the last two major bombings we've had in this country resulting in large loss of life for injuries.
Oklahoma City in the World Trade Center and -- -- if they were all cleared by arrest.
At least the rest were made when the first few days so this is this is a great news network.
47 hours from the moment this took place near 47 -- side post bombing but provides so we certainly hope it is true I mean that's part of what's happening here we hope it's -- We wanted to be true but we -- bring -- the facts and we'd love to hear from the FBI which we hope to do as well.
Let's talk about what they found and and may be weekend.
Once you get rid of me take me Afghan.
Keep let's keep -- -- a federal courthouse in case anything happens may we can split screen with.
The bomb fragments that were released the pictures of the bomb fragments that were released by the authorities showing pieces of what they now say was a pressure cooker.
What they now believe was a circuit or part of -- circuit board what they say -- Ball bearings.
And to me as a layperson it means almost nothing but to -- was a bomb expert what -- these things tell us.
First of all the pieces.
That you see there and those photos are very large.
Most of the time when they -- a very powerful.
Explosive device those pieces of middle and much much smaller.
It's obvious it was a backpack its its its tattered it's shredded.
Here's Elizabeth Zetterberg and even recognize that from perhaps from a backpack that -- thing.
I've actually put devices and backpacks and the zippers will almost always survive someplace and the scene fairly tough to get rid of on -- country -- popular opinion there is no such thing as vaporization these crime scenes most people think that -- on bomb blows up.
The evidence is vaporize and -- but does not happen in real life those pieces are out there sometimes they're very very largely to once you have now -- explosive -- is not that powerful.
Sometimes they're very very small.
World trade center of the devices were very very small some of the devices I -- -- broken my career.
You can barely tell what they are what traits and and it's very correct and Oklahoma City 95.
Those devices of the confusion must explosions but the -- was still out there and -- recovered.
And led to a successful.
So we benefit from the fact that these explosives were not that large so we can see a -- -- -- and -- we can see pieces of what the bomb maker put together and I guarantee.
You that they will -- these are people who are all been trained.
By by organizations who specialize in post list investigations.
They will recover probably 95 took almost -- half percent of that device with a -- Is there any chance of DNA -- ever fingerprint or other DNA being on that on that zipper on those nails fingerprints will survive a detonation.
Trace evidence hairs and fibers will survive DNA evidence will survive country -- -- public opinion.
If the suspect is -- pure which most of them or not.
He will leave something back behind the crime scene it'll come back home to -- well in what does that mean forensic click here.
That means a person who knows crime scenes will Wear a tie -- -- Wear gloves when he's -- device.
He knows evidence he knows there's one hair flowing out and landing in this device so what again most of these people -- not.
That way -- so -- leave something behind.
And what Powell.
I mean do you think it will actually be able to recreate this -- -- they no pressure -- so that should presumably tell them where to start.
They will these this evidence we'll go -- to get -- eleven Quantico.
And that lead has a registry of every battery every piece of wire every blessing -- every initiator.
Every switched known to mankind and they'll be able to be --
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