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We're hearing about this press conference Katherine from the FBI it will be.
If it happens it will be the first in 48 hours two full days but what -- way to make a vast.
Well I'd say they're probably three key points with the tells me from my experience is that the situation in Boston.
Is extremely fluid right now.
-- number to win you release images.
That's a tough decision because rate now you've gotten investigation.
That's really maxed out it's working at full tilt and when you release images and you asked for the public's help you're gonna Fletcher system.
Thousands if not tens of thousands of tips -- you can have the effect that actually taking that investigative machine.
And almost grinding it to a halt so can actually work against you.
The the other thing that comes to mind is that when you released images of people that you want to talk to.
That can have the effect if they have any kind of association with Boston or maybe they have some other problem here with the -- in the United States with their immigration status.
It can cause them to move and to flee.
And that is what we saw in the Times Square -- bombing attempted bombing in 2010 Faisal Shahzad was caught as he was trying to flee the area bill.
Yeah you know Catherine you've talked to a lot of people today are you getting indication that there could be some sort of an image put out at 5 o'clock or is that something that is still 5050.
I just don't want to speculate on that I think putting an image is a very tough call for the people involved in this investigation.
OK now we mentioned the social media -- tell us more about how that fits into this investigation.
Well an investigative sources told Fox News -- that there was a very significant social media footprint.
At the time of the attack.
What's happened is they've gone in and they put a radius a mile radius around the attack site and they.
Essentially sucked up all the social media messages from 24 hours before -- 24 hours after.
They take all of that data.
And they do what's called link analysis which shows the relationship.
Between messages that are deemed to have.
Investigative value when we asked what investigative value was.
They said things that seemed anomalous somewhat at a place and also messages that seem to have some kind of coding element to it.
We were also told by this investigative source that this social media.
Is also providing some promising leads for the FBI so right now you've got three tracks you've got the video.
You put the still images and then you also have the social media as well.
-- Catherine thank you two hours and waiting will hold here fast and true.
In Boston until then Catherine -- working that story in Washington and.
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