u need a big combination to get into your gun. >> sean: exactly. the news continues. we'll be back here tomorrow night. thanks for being here. >> greta: this is a fox news alert. have you seen these men? the fbi releasing video of two suspects in the boston marathon bombing. >> good afternoon. i'm the special agent in charge of the fbi's boston division. since monday's bombings, the fbi and our law enforcement partners have been working around the clock, and are fully committing to investigating this matter to bring those responsible to justice. our collective law enforcement team has pursued thousands of leads and tips. as i said two days ago, we are working methodically and with a sense of urgency to identify those responsible for the bombings. within the last day or so, through that careful process, we initially developed a single

person of interest. not knowing that the individual was acting alone or in concert with others, we obviously worked with extreme purpose to make that determination. the entire force of the federal government, the fbi in boston, around the world, as well as our partners in the boston police, atf, massachusetts state police and more than 30 agencies of the boston joint terrorism task force have set about to ensure that all responsible for the bombings will be brought to justice. more importantly, it was done to ensure the future safety of the city of boston, the commonwealth of massachusetts, and the country. indeed through that process the fbi developed a second suspect. today we are enlisting the public's identify to identify he two suspects. we are releasing photos of the suspects. they are identified as suspect one and suspect two. they appear to be associated. suspect one is wearing a dark

hat. suspect two is wearing a white hat. suspect two set down a backpack at the site of the second explosion just in front of the forum restaurant. we strongly encourage those who were at the forum restaurant, who not contacted us yet, to do so. as you can see from one of the -- from one of the images, suspects one and two appear to be walking together through the marathon crowd on boylston street in the direction of the finish line. that image was captured as they walked on boylston in the vicinity of the intersection with glouster street. as you can see, the quality of the photos is quite good, but we will continue to work on adeveloping additional images to improve their identification value. further on fbi.gov we have photos of the suspects. the photos and videos are posted for the public and media to use, review and publicize. for clarity, these images should be the only ones -- i everyone

size the only ones -- that the public should view to assist us. other photos should not be deemed credible and they are unnecessarily divert the public's attention in the wrong direction and create undo work for vital law enforcement resources. for more than 100 years, the fbi has relied upon the public to be its eyes and ears. with the media's help, in an instant these images will be delivered into the hands of millions around the world. we know the public will play a critical role in identifying and locating these individuals. somebody out there knows these individuals as friends, neighbors, co-workers, or family members of the suspects. though it may be difficult, the nation is counting on those with information to come forward and provide it to us. no bit of information, no matter how small or seemingly insequential is too small. each piece moves is forward

toward justice. it is extremely important to contact us with any information regarding the identities of suspect one, suspect two, and their location. we consider them to be armed and extremely dangerous. no one should approach them. no one should attempt to afternoon henned them except law enforcement. let me reiterate that caution. do not take any action on your own. if you see these men, contact law enforcement. if you know anything about the bombings or the men pictured here, please call the telephone listed on the photo arrays. that's 1-800-call-fbi. all calls will be kept confidential. we have also established a website for tips that directly relates to the bombing. please contact us at bostonmarathontips.fbi.gov. again, that's

bostonmarathontips.fbi.gov. the photos can be viewed on fbi.gov. it's important to everyone size the images from monday are indelible and the horror from that day will remain with us forever. this further underscores our need to pursue them judiciously. the victims and survivors deserve nothing more -- income g less. excuse me. the fbi is committed to ensuring the victims receive the rights they're entitled to and the assistance they need to cope with the crime. providing them with assistance will better our cases. our resources include an office of victim assistance at fbi headquarters and victim specialists nationwide. these highly trained professionals can assist victims and coordinate with other agencies to provide victims with the support, information, and resources necessary to effectively meet their needs.

our victim specialist team continues to work around the clock to bring assistance to the victims of this heinous act. identifying and locating those responsible is now our highest priority. no other details of the investigation will be released at this time because this is our focus now. it continues to be an ongoing, active investigation. review these photographs and contact us at 1-800-call-fbi or bostonmarathontips.fbi.gov imme bostonmarathontips.fbi.govimme diately. thank you very much. [inaudible question] >> i wouldn't want to comment on that right now. i want want the u.s. attorney to comment on that aspect. >> we got photographs, folks, of -- >> next question, pleas next question, please. >> are both suspects seen planting these devices at the

finish line of the boston marathon? >> no. the only one observed planting what we believe to be the device is suspect number two with a whitecap. >> at what time did they put the devices out? >> i don't have the precise in front of me. it was shortly before the bomb blast went off. within minutes. >> are these the sole people of interest to the fbi? >> at this time these are the so many people of interest to the fbi. >> do you have any information on what they did after the explosion? any indication they were around watching? do you have any video of them walking away? >> suspect number two, with the whitecap on, proceeded west on boylston street. that's all we know right now. >> sir, can you address the -- newspapers in all over the country, including the "new york post," identifying two men as potential suspects, i'm just wondering what it does to your

investigation when things like this get out, and these guys run. >> i think i addressed that -- thank you. i think i addressed that question in my statement by saying the only photos officially relied upon in this investigation are those you see before you today. >> do you stand by your earlier statement that there's no additional danger to the public? >> i do standby that statement right now. there's no additional imminent danger we're aware of right now. >> greta: we're live in boston with the latest on the investigation. mike, that video, those pictures, have now bounced around the world. everybody has seen them. in all likelihood, if you were at that marathon, you have now seen it, too. so if you were in that picture, you're innocent, it's time to step forward, right? >> that's it. that's why the fbi has turned to the public. you heard the special agent in charge saying basically for all the leads they chased down, for all the groundwork they've done, they had exhausted their best

leads. they turned to the public for new leads and got them just as quickly as this information went out, just as quickly as the new images went out. more images came back in. our affiliate, fox 25, coming up with new images of the individual now identified as suspect number two, in the white ball cap, standing by the finish line. what appears to be a backpack by his feet. that would be consistent with what the fbi said in this press conference, what they told us earlier. this is the individual they say carried the backpack, containing the bomb, up there toward the finish line here on boylston street, took it off, set it down in the crowd where that blast occurred. that was right in front of the forum restaurant. they're appealing to the public. anyone by the finish line just before 2:50 p.m., when they believe the backpack was set down, shortly thereafter detonated. anyone out there taking pictures, taking video. take another look. see if you see this guy with a white ball cap, some say it's a

polo ball cap turned backwards. his associate, the man the fbi says was associated with him, working in concert, according to the fbi, the two bombs going off 13 seconds apart from each other, they're still looking for all the leads they can get, greta. >> greta: whoever put that bag down that went off, that second one, had to see the mother, the 10-year-old boy who was killed, his sister. i mean, the level of cruelty is just absolutely astounding. you had time to think about this. you actually walked over, the crowd was just standing there, waiting to watch. you set it down and looked around. i mean, it's unbelievable. i'm curious, mike, have the -- i assume the tips are pouring in? >> the tips are pouring in. well, you have to assume that. you're asking me to speculate a little bit. we just know a couple of them we've seen through our affiliate. there's a lot of discussion that names are coming in through

other sources. you know, we've just got to give it time for the fbi, the joint terrorism task force, they'll get this flood of information. they've got to sift through it now and determine which ones are good. >> greta: the disheartening information that we have, if you want to drive from boston to los angeles, you can do that in about 43 hours, about 79 hours has passed. it's four hours to j.f.k. five hours to montreal, to that airport. whoever these two are, they've got to have seen themselves on the videotape now. if they have nothing to do with it, they should step forward. i'm curious, does the fbi have any leads, or was this sort of a hail mary passed to the people to help track them down? >> well, when they make a move like this, this is the kind of thing that investigators don't like to do. they would prefer to go in quietly, pick these guys out of their beds at night, when they don't see it coming. when you go big and loud like this, first of all, they get overwhelmed with the new information that will come in to

them. also your suspects are going to do something they weren't doing before. if they were trying to hide in plain sight, blend into the crowd, they're not going to be able to do that anymore, because these images are pretty clear. someone can identify them rather quickly. a very likely development will be someone knows them and will identify them. what could work in favor of the investigators, they will try to do something different. if they were try to lay low, they pick up and move, this could generate new leads, new people could see them and call in. >> greta: mike, thank you. we should also note they may have split up, so people could see them not together, be looking for a single person, not necessarily together. thank you, mike. >> you got it. >> greta: what is the fbi likely tonight besides waiting for the phone or internet tip to come in? a retired fbi agent joins us.

tell me, jeff, when you look at this video, the pictures, they're pretty clear, aren't they? >> yeah, they're very clear for this type of case. very surprisingly, they got pictures. they worked hard to get those. they pheced the two people, two suspects, together over the course of the last 24 hours. that's a really good development. really positive they're so clear as well. >> greta: that's the good development. the bad development is the time. we've had about 79 hours and change now since the bombs went off, an awful longtime to get away. even if you got in a car, you could drive to l.a. in 43 hours. that's the bad news. people shouldn't just look in the massachusetts area. they should be looking around the world for him, right? >> yeah, that's right. the fbi and police are not sitting around waiting for calls to come in. they're taking calls. the minute that press conference took place today, those pictures were made public officially from the fbi, they were getting dozens of calls. they probably have hundreds on -- that haven't even been vetted out yet. i think with these types of pictures, there were some controlled release of the information, because i think

there might be something the fbi has, some information, maybe another picture, they don't want to release to the public right now, and that's done on purpose, because they want to use that as a screening tool. you'll get calls all over the place. people saying "the guy in the white hat looks like a guy i went to school with." what school? graduated from 2008. i don't know his name. is that something to look at in more detail? maybe. if they have a screening tool, some other information they can ask, decides whether that lead goes to the top of the pile or bottom of the pile. >> greta: we want to let the american people know watching this, any one of these could show up in a 7-eleven a gas station in your community, you never know, because they are on the run. they now know that everyone is on to them, the fbi is on to them. >> right. >> greta: i would imagine they have much more video of them as sort of cameras catch them as they walk down the street, all the surveillance cameras. i would suspect they deliberately didn't give us all

the video. >> probably not. these are the clearest shots of their face, but again there could be something they're holding back as a screening tool. these people could be international, be out of here, be in a foreign country, being protected by that country right now. so all the people looking for them, all the people calling in these fingers it's not going to have any lead generation from that, because they're gone. >> greta: all right. and of course flights from boston to heathrow, once you get to heathrow, you can go to virtually any country in the world from that international hub. jeff, thank you. >> you're welcome. >> greta: now to another huge clue in this investigation. the battery used for the bomb. federal agents believe tonight it is a battery found in children's toys. fox news chief intelligence correspondent katherine harridge joins us with that. the fbi want to get these two. >> well, what the fbi said to us, they have a record, so they've never seen this volume

of tips in the past, a record number of tips associated with this case. >> greta: of course, if you don't know where to call, go to gretawire.com. we've got the fbi number, the website where you can go. it will link right to where you need to go. now to the question of the battery. >> the battery, i was told, has some significant investigative value, because it comes typically from a toy, one of those radio-controlled toys. it was used as the energy source in the bomb. the bomb-maker went an extra step. rather than going to a drugstore or home hardware store and buying a pack of aas or aaa they bought that toy and took the battery out. the other thing is, this is someone that have had bomb training. when people are under stress, as people are under stress building a bomb, they will go to what's most comfortable with them, how they were trained. so that as an investigator, you say who is it who trains people

to buy these kinds of troys or items, remove the battery and wires. that gets you to a subset of potential groups who may have been involved with this. >> greta: actually i would think it would be smarter to buy the routine aa batteries, because you can buy those any place. these batteries you have to go to a hobby store, narrowing the universe. now they fan out and go to those stores. in some ways that was a -- >> that was a mistake on their behalf. again, to emphasize, everyone has a different style in bomb-making, how they train people. >> greta: like a signature. >> exactly. so this individual was most likely trained to buy an item, take the battery and the wires, and pickup truck it in the device. that's only something that you would see in a certain kind of group. not necessarily something that you would see sort of out of the box. they always do what they're most comfortable doing under pressure, and they were clearly under pressure here.

>> greta: is there any indication that they know which group, have they wardrobed down thnarrowed downthe group? >> the testimony on capitol hill from the director of national intelligence is that it still remains wide open. there's no determination on domestic, international, homegrown, or whether these were self-radicalized people who are already here in the united states. but here's what caught my attention. you're talking about two people. so it's not a lone wolf. it's at least a conspiracy of two. those individuals had to have some kind of support network leading up to the attack. now was the support network unwitting? you know, they just were housing these guys, loaning them a car, we don't know, or was it a broader conspiracy of people part of this plot to make it happen. >> greta: the fbi says somebody

knows them, somebody has seen them. the american people need to keep their eyes open. thank you. >> thank you. >> greta: up next, millions of people, not just here in the usa, but around the world now know what the bombing suspects look like. the fbi says, as i just noted, somebody knows who these men are. a break could come anytime now. it's just a matter of someone calling the fbi tipline. we have much more on the boston bombing investigation. our live coverag coverage covers continues. and a fertilizer plant exploding and almost demolishing an entire town. that live report from texas coming up. the humble back seat.

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they could b anywhere. not just in boston, because they probably hit the road right after the two explosions. the fbi desperately wants phone tips, but there are other investigative leads the fbi is chasing down tonight. the bags the bos were in could also lead to the bombers. skip, nice to see you. tell me f you wer, if you were investigating these backpacks that were blown part, what would you be doing? >> at the investigative stage, there's a lot. in the history of forensic science, there was the last great train robbery in the 1920s from a detonator in a bag. the wizard of berkeley determined that the charaer they were looking for was a left-handed lumberjack with his height and his weight, and everything they wanted to know, including eventually his name. i worked on a case, a number of case actually, one of which

involves a fanny pack lt behind in the murder of a family fr for the tokyo police about 10 years ago. in that case we were able to extract particles of sand that told there was a united states connection to the desert. in a case like this, it was brought in from somewhere else. it records a history in its microscopic particles about where it's been, occupations, even potentially snips of wire, insulation of making up a bomb, components for timing devices and so forth, even potential explosive residue in there. so at the investigative stage the point is you never know what you'll find. that's why we basically look at everything. you would recover and analyze all these microscopic traces with the idea that something would ring a bell, because legal literally at the beginning you don't know what you're looking for. unusual things might start to yield clues.

>> greta: is a bag, generally like a knapsack or something, a gym bag, can it be sort of like a mop or sponge and absorb, like, dna particles so you could extract dna from it for a future comparison? is that possible? >> you can certainly extract dna as long as people handle it without gloves, and it picks up a record by where you've been by the dust it contains. the analogy you used at the outset was a sponge. absolutely it's a sponge. that's why we examine clothing in these cases to figure out where somebody's been, what they've done. no particles is too small today. we can magnify and analyze particles that we have to go a million tes magnification sometimes and do a chemical analysis of little specks. >> greta: how about a fiber transfer? there's fiber from the bags, you pick up the person, the american might have clothes on, a fiber transfer. is it possible that you could do that kind of comparison to link the person with the bag?

>> you certainly can. sometimes not just that, maybe the environment, but that would be a second step after you have someone in custody. the focus of the investigation changes from trying to identify a suspect or a location to actually looking to see if there's material which connects that particular item, in this case a knapsack, to an individual, with their clothing through fibers, or the environment with various dust particles there, whether it's pollen grains that put them in a particular location, the minerals that are present, or even chemicals from bomb-making. all these little particles stick around. what makes trace evidence so valuable is the fact that you can't see it, you're not aware of it, and there's almost no way to protect against it. >> greta: skip, thank you. >> you're welcome. >> greta: well, the pictures, the bags, the fibers and bombs, they are all giant potential clues. right now investigators are

rebuilding the bombs from fragments. some are very small. the circuit board could also provide more information. kevin miles join us. kevin, why is the circuit board of any value in an investigation? >> the circuit board, if it's pardon of this ied is a significant event. ieds containing circuit boards like this are relatively rare in this this country. other parts of the world have them routinely. in this country, they're few and far between. in orange county, a bomber used one of these items, blew himself up before he could place it. what this tells me, if that's the case, the person who built this ied has demonstrated a knowledge of ieds that we normally don't see in the u.s. on a regular basis. >> greta: is there any information that there is a circuit board in this one? do you know?

i know, we hear so many different things. have you heard anything to indicate there is? >> i have no, other than what i've heard on the news. >> greta: if you were going to do an investigation, what other part of the bomb would you really like to see that would help you lead to the people, you know, sort of an investigative clue? >> all parts of the ied have highestary value. the backpack is in decent shape, identifiable as a backpack. it will be sent back to the lab. the label might still be on it, the manufacturer, make, the label still on it. that could be valuable. the pressure cooker is in decent shape. it's identifiable as a pressure quiching. normally on and on an ied the e unrecognizable. if the evidence is in that decent of shape, the rest might

be out there. >> greta: if we both went to "inspire" magazine and looked at the directions at how to create a bomb, we both set out to make a bomb, would our bombs look a lot alike or is there a personal signature? >> well, everybody has their personal signature. i used to have one when i built ieds for the fbi the last 20 years. they play supplies wire a different way together, use different tape. everybody is an individual, even when it comes to building ieds. >> greta: so that may be sort of a helpful lead, if there's a design matching this bombing with perhaps another bombing. >> absolutely. the fbi will get that evidence, research all the components and see if they've been used in any other device. that battery is a big deal. i've never seen a battery like that before in my years. never even heard of it before. that's a great investigative lead. >> greta: i got an email from a viewer during the break that said you can buy them on ebay,

they're chinese clones, gave me an impression that i could go to a hobby shops, much more prevalent i thought. >> the fbi knows that, and i'm sure they're running with it right now. >> greta: i wouldn't be surprised if already they have the name of these two, or they know where they are, because i think the american people will hustle on this one. somebody has obviously seen that he ithese two. thank you, kevin. >> you bet. >> greta: hundreds of law enforcement working to find these men. just one good tip, that's all they ieed. if you've seen these two men, call the fbi. they have warned us, do not approach these men. they are armed and dangerous. the latest on this breaking news story is coming up. also texas governor rick perry calling it a nightmare scenario, a fertilizer explosion devastating a texas town. a live report coming up. we went out and asked people a simple question:

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photos, so people apparently were rushing to the site to look at the photos. so it crashed it. they must have lots of tips coming in. we're hoping they do. >> greta: i'm even getting tips here on gretawire.com. tom from north port, florida, says the fbi should be reminding people if the two look familiar on the video, you haven't seen them since monday, they've suddenly moved out of the apartment complex you live in, call the police. it's unbelievable the amount of groundswell, help, that's going on here. i'm curious, in terms of the investigation there, is boston sort of -- everyone sort of moved on or is everybody still focused on this? >> well, at the "boston herald," we're definitely focused on it. we've been covering it since day one, and will continue to cover it. we hope we go to a press conference tomorrow where they announce the suspect in the

case. authorities are asking people to look through their iphones and smartphones again to see if they can spot the suspects, any information they might have, send the photos in. even a small little piece could solve the case is what we're hearing. >> greta: is this all the video they have? i would suspect there's a lot of surveillance cameras up and down that street. we were up there monday, and i saw a lot of stores. is this the only video they have or do they have more? >> we don't know, but the fbi has said that they did see suspect two, the suspect wearing the white ball cap, they said they have evidence of him dropping a bag in front of forum restaurant. we don't know if that's video, photos, or eyewitness accounts. they say he appears to have dropped a bag in front of forum restaurant, right at the finish line. that was the first bomb that went off. >> greta: that's where the 10-year-old boy was killed, his mother suffered brain injury,

and hister sister, i think, lost a limb. when he set that bag down, he knew exactly what he was doing. is that the bomb that caused that -- you know, that incredible crime? >> well, it was a little bit of chaos when the bombs went off simultaneously, and lots of people caught in between, trying to flee. the first bomb that went off was right across from the grandstand, where hours earlier major -- major officials in the state were there viewing it. so it was -- it was the finish line there. there was a lot of -- from what i understand -- serious injuries. >> greta: erin, thank you. >> thank you very much. >> greta: the fbi is using everything to track down tease e suspects. the ceo and president of ani metrics spoke about how facial recognition works.

we want to point out one thing, the photos you're about to see are not related to the actual bombing investigation. >> i have an example here i can show you of a surveillance picture. this is a guy that's coming out of a door, it's a surveillance camera picture. that picture, as is, when you take it, run it through a face recognition system, it's not going to work. you're not going to get results at all. the face is anglated. pretty small resolution-wise it's going to be difficult. this might not turn up no results because of the slight anglation in the face. we have a suspect, think this is the guy, will that turn up in the database? the answer is probably not. we can do something with this face to make this face appear in the database if that's the guy.

let me take you to a tool called forensicca. it creates a 3-d of that -- >> just to remind our viewers, the photo we're working with is not in any way related to this investigation. >> not at all. this finds all the features on the photos. here's the mug shot. here's the photo we got from the surveillance camera. you can see all those features. so what face recognition does, it tries to get the features correct. that's the first step. first looking for a face. then it's looking for the eyes. once it has that, then it tries to figure out some of the other features of the face. if i -- this is a manual mode program, by the way. if the features are wrong, like if i got the eyes wrong, the feature was out here, i can move that feature back on to the eye center manually, and therefore get a better result. the result i'm looking for is 3-d. this over here is the guy a -- s the guide to the map of the

face. same thing down here. there's frontal of the guy. make sure the nose is on the tip. it's there, boom. now i'm going to -- from these photos i'm going to create a 3-d. that's going to take about five seconds. it will come up, and there you have it. it's showing first the upper photo. if i turn the face, you can see now that the system, the program, actually made a three three-dimensional model of that face. it added singlemy tri, because i cannot see the right side of his face. >> can you run the image you created from the photograph through a database to try to identify who this person is? >> absolutely. i won't do that now, because i'm not hooked up to the database. we would take this photograph here, submit the one above there, the original, we would

submit that, get back that result in a very large database. it's because of the postcorrection that made it happen. >> greta: our other developing story tonight is next. a. fertilizer factory blows up in texas. the explosion is absolutely affiliates. at this hour, there's a frantic search for the missing. could anyone still be alive inside that factory? a live report from texas next. ] ♪ [ male announcer ] every car we build must make adrenaline pump and pulses quicken. ♪ to help you not just stay alive.. but feel alive. the c-class is no exception. it's a mercedes-benz, through and through. see your authorized mercedes-benz dealer for exceptional offers through mercedes-benz financial services.

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>> we need every ambulance we can get this way. a bomb just went off. we've got a lot of firefighters down. >> firefighters down. >> the rest home seriously damaged. we have many people down. please respond. >> getting you everybody i can. you have deputies, fire, ems. i'm sending everybody i got. >> greta: monstrous explosion at

a fertilizer plant killing as many as 15 people. 24 hours later several volunteer firefighters are missing and feared dead. more than 160 people are injured. our fox correspondent is in west, texas. dominic, tell me what's going on there tonight. >> well, we now have a casualty number of in excess of 200. that's the latest numbers we've got. with regards to actual number of deaths, the authorities are still putting it in the range between 5 and 15 at this time. the mayor of this town, a community of 2500 people, says between 8 and 10 bodies have been recovered, and they think half a dozen more bodies will be found in the hours ahead. search will continue throughout the night. one victim, the dallas fire rescue captain, kenny harris. he was 52 years old, a 30-year veteran of the service. he leaves behind a wife and

three sons. we also understand that three paramedics also died. there are between three and five firefighters who currently go unaccounted for. the community very much shaken by this news. that's why we saw so many people pack into st. mary's, the church in the town, an hour or so ago. wall-to-wall people, crammed in. firefighters in attendance. a lot of tears and personal reflection. it's shaken the community very much to the core. as for the cause of the blast, we don't know very much about that at this time. we do know that a fire had broken out. when fire crews turned up, they doused the flames with water, but because it was ammonium nitrate at the site, suspicions that water when it mixes with it could be a hazardous situation. right now the authorities are dealing with it as a criminal situation because that's protocol could take up to six months before we know the cause. back to you, greta.

>> greta: thank you. first responders raced into action, a job dangerous even for firefighters. >> even fire unit near the fetor line plant, you need to pull back immediately. any fire department close to the fertilizer plant, pull back. attention, all units, if you're near the red zone, you need to evacuate toward the command center. it is still a hot zone. again, if i have any units, near the rest home, you need to evacuate toward command center. >> greta: waco ems responders join us. do you have any information tonight beyond what dominic told us? they're missing first responders. is that right? >> yes. first, we send out our prayer and condolences to the people of

west, fire, police, and first responders. at this time they're still at the scene, doing the search and rescue. >> dale, you were there last night. describe it for us. >> i would describe it initially as organized chaos. initially on scene there was multiple patients. chaotic, as most scenes are when something of this magnitude happens. >> greta: when you look at the magnitude of this crisis, it's hard to believe that your community could possibly absorb -- you know, do the work that's necessary, but you see everybody -- everyone came in to help. >> exactly. we're about 15 miles from west. it's north of us. we started sending responding

units. dale was the first director on the scene. as he went to the scene, started doing the assessments for triage and treatment, we resupplied him with supplies and other personnel. personnel were called up, and we started sending them out to quickly assess the patients to get ready to transport them to the hospital. >> greta: gentlemen, i'm terribly sorry about what happened. thank you for joining us this evening. >> thank you, ma'am. >> thank you. >> greta: straight ahead, "on the record" takes you inside the boston marathon investigation as our breaking news coverage continues. that's next. i think ford service is great, but i wondered what a customer thought? describe the first time you met. you brought the flex in... as soon as i met fiona and i was describing the problem we were having with our rear brakes, she immediately triaged wrong with it,ew exacts the car was diagnosed properly, it was fixed correctly i have confidence knowing that if i take to ford it's going to be done correctly with the right parts and the right people. get a free brake inspection and brake pads installed for just 49.95 after rebates when you use the ford service credit card.

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>> greta: at this hour the fbi is manning the phones, waiting for the call, the tip, any tip that could mean the difference in the marathon bombing investigation. charged in the shooting deaths of the kickoffman county district attorney, the da's wife and assistant da. police say eric williams was the trigger man. his wife is accused of driving

the getaway car. police say the motive was revenge. both murdered lawyers had prosecuted williams for theft, ending his judicial care. now to the ricin letters sent to president obama and senator roger wicker. the mississippi man last night making his first court appearance. paul curtis facing charges, threatening the president and others. his lawyer says curtis denies sending the tainted letters. and senator ricker saw him working as an elvis impersonator at a party he had thrown. stay with us for a second live rain shower of "on the record." we'll be right back. c-max two. that's a super fuel- efficient hybrid for me. and a long range plug-in hybrid for you. now, let's review.

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