re trying to help those victims in boston are there. they're legit. go ahead. give them some money. it's a good idea. it will be very, very important. it will make you feel good in the process as well. that's it for me. i'm wolf blitzer. "erin burnett out front" starts right now. investigators say they have found female dna on parts of the bomb. and tamerlan tsarnaev's widow, what was in the evidence bag they removed from the home today. plus misha revealed. he is found and speaks. let's go "out front." good evening, everyone. i'm erin burnett.

we begin "out front" with breaking news. major development. investigators have found female dna on at least used in the attacks. what exactly does that mean? the latest on the investigation. more on what the fbi found at tam tamerlan tsarnaev's wife's house. and a possible link between tamerlan tsarnaev and a known jihadist. and in washington, d.c. tom foremen with a look at how authorities could have prevented the attack and at what cost to america's privacy and freedom. i want to go to boston first. susan candiotti has this breaking news. what do you know about the female dna that investigators apparently have found on one of the bombs used in boston? >> reporter: erin certainly this is an intriguing and a very important development. by finding that female dna on one of the pressure cookers, it certainly helps move forward this investigation. we know that investigators have

been looking for any kind of remains of the pressure cooker bomb looking for hair samples, anyles, fingerprints for example. now we know that it has tested positive for dna. we also know that today the fbi retrieved a dna sample from tamerlan tsarnaev's widow katherine russell, at her parents' home in rhode island. just because they took a dna sample and even if hers should match the sample o the pressure cooker, it doesn't necessarily implicate her or any other particular female in terms of whether they had anything to do with the preparation or the construction of the bomb because, for obvious reasons, our sources caution us that it could also mean that a female at any time could have come into contact with any portion of the bomb maybe even before this pressure cooker was even put together. a wide range of people.

so it could involve perhaps, if it's not her dna, it could be possibly her daughter's dna. that match has not yet been made. or it could belong to somebody else all together. but certainly, erin it does move this case forward. >> it certainly does. we'll find out a lot more. susan said obviously, significant development. but if it is the wife's dna, is it possible she wasn't involved? we'll talk more about that with a forensic expert in a moment. fbi investigators spent 90 minutes inside the family home of tamerlan tsarnaev's widow, katherine russell. she was at the residence when investigators arrived. and erinn investigators arrived. female dna has been found on one of the bombs. you found them today remove something very specific from katie russell's home. >> reporter: well yes, erin. we saw these fbi investigators

go in with evidence-gathering equipment. that included a these investigators was hugging against her chest when she came out. another that was a big, black briefcase or looked like a big black briefcase, sort of hard shell sort of equipment case and a clear plastic cylinder that looked like a two-liter soda bottle. the most interesting thing was this clear plastic bag marked dnamples, which looked like kits and scissors in it but dna samples was clearly written on that bag, erin. >> people will be asking questions about what the significance of that will be in light of the reporting on the dna, on the bomb. we know also, erin that katie russell left the home with investigators, or at the same time as investigators, i guess. she has now returned back. do you know where they went? >> reporter: they went to her attorney's office where she was meeting with federal investigators for about 90 minutes there as well. they have since come back to the house, as you mentioned.

erin i should point out that there are still federal investigators or some sort of federal presence still stationed outside this house as they've been the past week erin. >> erin mcpike, thank you very much. reporting from rhode island tonight. female dna on at least one of the bombs. breaking news tonight. that's what authorities are saying as they continue investigates the boston marathon terror attacks. we want to emphasize, it's unclear whose dna it is and it is unclear whether, when we find out who that person is that person actually helped build the bomb or carry out the attacks. it could be a crucial link. joining me on the phone, a forensic expert and adviser to the state department regarding forensic science laboratories in the ukraine. good to have you with us lawrence. >> it's a pleasure. >> all right. let me just ask you -- i know there are a variety of scenarios here. obviously, they are collecting dna from the wife. they now have female dna on the bomb. make this clear. she could have if it is her dna -- and we'll get to why it

could be someone else's in a moment. she could have come into contact with this and not have anything to do with making it right? >> that's absolutely correct. we're talking about skin cells. we're talking about touch dna simply by touching an lems though with dna is that we don't know when the dna got on the object. it could have been a day, a week. it could have been two weeks before anything happened with respect to the construction of the bomb. so we can't jump to any conclusions. the good news is that we have some information. we must have genetic information about, you know who came into contact with the bomb or parts of the bomb. we know that dna survives explosions. so we were fully expecting to get some genetic information. i think the surprise is that it's from a female. and, obviously, this dna is comparative science, you need to

match it to something to make any sense out of it. >> so they're obviously clearly looking at the wife? they have to be. she lived in that apartment. but when you talk about dna on a bomb is there a way for them to know for example whether the dna on the bomb frag camement came from a possible victor is it somewhere so embedded in the dna of the bomb for lack of a better word, that you would be able to say this dna was likely from someone around the building process as opposed to a victim? >> no erin. you raise a good point. dna could be from one of the victims. it most likely would have been in the form of blood rather than skin cells. but, again, we're talking about a comparative science. and we're talking about the source of that dna on the bomb. you need to compare it with something. you need to have some other profile to make the comparison. and that's why katherine russell is an obvious choice. it certainly is possible that it came from one of the victims as

well. we have to interpret what we see. >> as the dna -- they're checking her dna. if it ends up being that it is her dna, how do they make a link that she then knew about it and what its purposes were as opposed to for example, touching a pressure cooker that her husband took out of the box and left on the kitchen counter? >> erin you raise an absolutely perfect question there. all we can say is that her dna is associated with the bomb or a part of the bomb. how it got there, when it got there, could it have gotten there simply? of course. it certainly gives us more leads and the focus of the investigation would then be on her if in fact it was a match. >> lawrence, thank you very much. we appreciate your taking the time as we have reported investigators with a lot of questions about several people one of whom is tamerlan tsarnaev's widow, who lived in that small apartment and in very close quarters with her husband in the months leading up to the bomb and in the days after the

bomb exploded. a mysterious man named misha, you may have heard of him. he has been accused of radicalizing tamerlan tsarnaev. one person who spoke to misha is "out front." should we just give up our privacy in this country? after all, if you're not doing anything bad, why do you think dow care if they're watching you? dramatic rise in female suicide bombers. investigation into black widows, coming up. everyone's retirement dream is different; how we get there is not. we're americans. we work. we plan. ameriprise advisors can help you like they've helped millions of others. to help you retire your way with confidence. ♪ ♪ that's what ameriprise financial does. that's what they can do with you. let's get

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>> prosecutors are building their case against dzhokhar tsarnaev and relying on a crucial piece of evidence. surveillance cameras. you know there were so many of them around there. while these eyes in the sky have provided key intelligence there's no question about it intelligence that led to the suspect's being identified the security and surveillance comes at what price to americans' privacy? tom foreman is "out front." >> before the brothers reach boylston street before the bombs and the hunt that followed could police have been watching them and, frankly, all of us more carefully? that is the centerative fiery debate in washington and the answer is complicated. >> the technology exists. it's just that our constitution protects you from having that put in place against you. >> reporter: the potential technological power available to police is immense. first, more cameras. the number of surveillance cameras has exploded since 9/11. in chicago alone, american civil liberties union estimates there are around 10,000 private and

public surveillance cameras. along with facial recognition software and that could allow police to track many thousands of people every minute. second mormon toring of communications and travel. if police tapped into our cell phones, computers and gps units, they could collect a wealth of information about almost everything any one of us is and, third, more security on the scene at large events. more searches more metal detectors, more officers questioning and frisking anyone who might even look like trouble. mind you, aside from the legal restraints on such eaves drop ing ing, security experts warn making these measures work in a country of 300 million would be tough. think of the sheer volume of data to be processed. >> frankly, law enforcement doesn't want to capture all of that. bad things. law enforcement wants to figure out who they need to focus on and who they can just let i6go. >> reporter: still, the bigger

question remains. does freedom from terror have to mean less freedom overall? for "out front," tom foreman, washington. >> it's a big question. it's one after 9/11 this country had to address. now we have to address it again. "out front," matt welch, and ari fleischer. you've been in the middle of this controversy before obviously. as we all know. 48% of people according to "the washington post" after the boston bombings worry the government is going to too far. and 41% are afraid our government will not go far enough. if they had more ability to watch over people they could have stopped these guys from killing and injuring these people to begin with. >> erin there's a forever strain between liberty and security in our country. and that particularly gets tested at a time when something like boston or after september

11th. i'm reminded of one of the most beautiful sayings i ever heard at cambridge university in massachusetts. laws are the restraints that make us free which is an amazing paradox, if you think a restraint can make us free. that's what civil society is. when times are tense and there's a security risk to our country i err on the side of law enforcement. a libertari a. n side we should all listen to. but at the end of the day we aye come down on the side of you need to protect the people protect the country so you don't get massacred when you walk on to a street. it's also why we have those security cameras up not to invade our privacy but protect us and keep us free. >> he makes a good argument. when people think about it they may not want those cameras. but if it's going to save their life or someone they know or stop a bombing like this why wouldn't you have them? >> for one, we have this false notion it's a one to one

trade-off, balance between liberty and security. if we just take away some of the liberty, the security goes like this. i kind of reject that. if that was true the most secure the most surveillance state country in the world would be the most secure. well east germany wasn't secure. ultimately it was unstable. it was vulnerable because you can't suppress freedom that much and get away with it. right? it's not necessarily tension. open societies, open countries tend to be safer and freer at the same time. so, in the case of boston you can't just have security cameras all over the place run by the government. it's not efficient for one. it relies on central intelligence. so we have to be mindful of constitutional restraints here. >> hasn't the threat in a sense, change? you talk about east germany. the threat here has changed, self radicalized, jihadists, hard to find. the world has changed and our constitution is going to have to change. the word privacy isn't even in the constitution, a federal

judge noted. abortion discussion for that, but it's not actually in there. >> the world has changed. it's gotten safer. we have less terrorism in this country than we did in the 1970s. there aren't people launching pipe bombs on every street corner in greenwich village anymore. we're not hijacking planes and going to cuba every other weekend. it's actually gotten safer in this yes, it's changed. what shouldn't change is the idea that there should be a restraint, something in between the government's desire to do something and an individual's right to walk around free of unreasonable search and seizure. >> let me ask you this. the fbi is saying these bombers could have learned to build these bombs on line. google if the company had been forced to tell us that these guys are coming to these kind of websites we could have found them. i looked up the other day how to build a pipe bomb. the results are limitless. it's unbelievable. i find it shocking they wouldn't have to report that. is it worth saying if you're looking for those kinds of things google has to tell us? >> no.

i don't think we should start limiting what people should do online. the government has a responsibility to keep as accurate a list of potential suspects as possible. their job after september 11th is to work with other agencies. if somebody is on a list for good reason the fbi should do a good job of surveilling that person all within the rule of law. you have to have a starting point that you suspect somebody is doing something and not a drag net to suspect all just for the simple act of going online. that would go too far. back to your earlier point, we have to remember we're not east germany. totalitarianism versus freedom. freedom is the right side and will win. this needs to be seen on the american continuum. we're not about to become totalitarian but we do need to be safe. one reason we don't have planes hijacked anymore to cuba we have given up our civil liberties and are scanned before we walk in a terminal. it's not a one up one down.

there is a tension. and the fact that we walk through a metal detector to get on a flight is yielding of some liberty for the sake of security. >> all right. thanks very much to both of you. let us know what you think. would you walk through a metal detector at a marathon? would you do it? or is that going too far? thanks to both of you. new detailstamerlan tsarnaev's trip to russia and whom he may have contacted there. a manhunt now under way in northern california. police searching for a man suspected of killing an 8-year-old girl. we'll be right back. [ kate ] many women may not be absorbing the calcium they t as well as they could because they don't take it with food. switch to citracal maximum plus d. it's the only calcium supplement that can be taken with or without food. my doctor recommends citracal maximum. it's all about absorption.

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a manhunt is under way in northern california after an 8-year-old child, a little girl was found stabbed to death in her she was killed saturday while she and her 12-year-old brother were home alone in valley springs, an hour south of sacramento. the brother is not a suspect at this time but are continuing to talk to him, since he was the last person to see his sister alive. out front in california tonight. >> reporter: sheriff's deputies on foot and in patrol cars made their presence seen at jenny

lind elementary school where leila fouler the 8-year-old girl stabbed to death in her home over the weekend, went to school. >> i'm scared for my kids. for the family. it's horrible. he was friends with her in they sit together at school. things like that don't happen here. >> why don't you tell us about what you have and why. >> i didn't want her to die. >> reporter: leila's mother told cnn via facebook we are devastated and she was so full of life. look at our baby girl. she didn't deserve this. police say leila and her 12-year-old brother were home alone saturday when he saw an intruder leaving the house. he then found his sister stabbed, severely wounded. she later died. since then police have been running down leads, but have no

specific suspect. >> we are searching extensively in attic ss and storage sheds. it is a difficult area to search. it's rural remote. the grass is tall right now. >> there are empty homes and outbuildings around here. there's a lot of huge rocks where somebody could hide in. >> reporter: authorities have combed the home for evidence. >> we've collected fingerprints during that search and also what we believe to be dna. those prints and that dna will hopefully be processed within the next week. >> michael range lives near the foul fowlers and heard of the stabbing by a neighbor boy. >> i took my kids inside and locked the doors and waited to hear actually what happened. it's been scary. we've been inside all weekend. >> reporter: a lot of residents feel trapped, pinned down after the mysterious death of leila fowler who would have turnedjune. valley springs, california. >> we'll keep following that

story. still to come more on the breaking news that we told you about at the top of the hour. investigators have found female dna on one of the bombs used in the marathon attack. and then who is misha? we are learning more about the mysterious man authorities believe radicalized tamerlan tsarnaev. the only man who has spoken to misha is next. but it may not be because the economic climate has changed. the old rules don't apply. so the investments she thinks are safe... are not. bny mellon wealth management helps you understand today's hidden risks prepare for tomorrow's, and retire without compromise. are you ready? bny mellon wealth management invested in your future. anyone have occasional constipation diarrhea, gas, bloating? yes! one phillips' colon health probiotic cap each day helps defend against these digestive issues with three strains of good

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e; i want to get back to breaking news in the boston marathon bombing attacks tonight. authorities are now saying that they found female dna on at least one of the bombs. now, i want to make it very clear at this point, while this could be a significant development, it is not clear whose dna it is and it is not clear whether it means a woman actually helped to carry out the attacks. investigators obviously are searching for any link. joe johns is in washington tonight with the latest. joe, what does this development mean exactly? >> erin everything you said is on point. sources tell cnn that yes, female dna was discovered on a fragment of one of the bombs of the boston marathon. they're obviously trying to figure out whose dna it was. they took dna samples at the home of katherine russell,

tamerlan tsarnaev's widow. what could this mean? we don't know. experts we spoke with stress that dna that they found at the location of the bombing could be belong to anyone who came into contact with virtually any of the consumer products used to make the bomb. so it may well not implicate anyone of anything. it could have ended up on a battery. there was a battery there, a remote control there. obviously, as far as we can tell there was certainly something on pthe pressure cooker. there were probably a in the chains of co went to market. it's not to speculate. all we know is that they have dna. they're not sure what it means and it belongs to a female. erin? >> joe johns, thank you very much. as we get ready to go to deb feyerick, forensic expert a few moments ago told me there's a big difference between skin cell dna and blood dna.

blood dna could have indicated that this came from a victim. skin cell dna, as joe ind indicated, from someone along the manufacturering line or someone involved in the making of the bomb. a possible link between tamer tamerlan tsarnaev, the older brother, and a jihadist in russia who died in a firefight with police while tamerlan tsarnaev was in the region right? >> that's right. what we're learning is that they're looking into the possible link between tamerlan tsarnaev and a young boxer, canadian turned jihadi. he and six others killed in the dagest dagestan region in july 2012, exactly the same time that tamerlan tsarnaev was in the very same region. his body was prepared for burial by an imam july 14th. they believe it was brought down from the mountains and prepare days later, tamerlan left

dagestan and went to moscow where he caught a plane to the united states. the time line of this is that tamerlan was actually waiting for his russian passport to arrive. he had applied at an office in dagestan waiting for the document the russian passport to arrive and he left without it. and that's what makes it so curious. when he flew into new york he did have a passport and his permanent resident card. two documents that he would have to enter the united states. it's curious as tohy he would have left that region without his new passport. that's why they're looking at this closely. erin? >> especially if that was extensively the reason why he was going. deborah, investigators are looking for a link between taan and another militant. did he learn how to build these bombs there, was he radicalized there? and now there's another guy,

too. >> exactly. the other link is to a man named mahmoud al sunidal. sort of this war lord and islamic extremist who was killed back in may of 2012. so what we see happening here is the creation of the timeline where russian counterterrorism forces are really going after these rebels who are in the mountains. so you have first the death of mahmoud and whether those two deaths influenced tsarnaev to get out of dagestan is what they're looking at right now. there's been no confirmation that he midwest met specifically

with these people, but they are were in the right place at the right time trying to link him there. >> that could be another crucial link. and another one is this. the mysterious misha. you heard the name by now. he is said to have influenced tamerlan tsarnaev and reportedly has come forward saying he had no role in the blood shed. his denial comes at the same time the cnn has learned the fbi has interviewed the man, misha, from rhode island about his ties to the tsarnaev family. "out front" now, christian carl. thank you very much for coming on. you caught misha and his family by complete surprise when you went to the home. you described him as a 39-year-old man of american-ukrainian descent. of medium height and has a thin reddish blond beard. >> thank you very much for having me on rkt erin.

it's a great honor. he was a very interesting character. i'm not sure what i was expecting. the man i met certainly did not fit the description, purely superficial terms of an islamic master mind who was manipulating people. he seemed actually rather agitated and very very nervous and -- but despite that he was quite welcoming. his family was very welcoming. and i was struck how much he resembled the physical description from some members of the tsarnaev family medium height stocky reddish-blond hair. and that matched in general terms of the physical description that the tsarnaevs had given of him. >> christian, misha is a common name in russia for mikhael.

i know you're talking about the superficial resemblance to the description. did you feel comfortable this is the guy? >> i really did, erin. first of all, i heard about him from some t i had found who have not yet spoken to the press. i'll be writing about them in my next article for the new york review. and when i was talking to them they were very kind. and they knew a lot about the tsarnaev family. they had associated with the tsarnaevs for many years and they were quite eager to tell their story. as they were telling me their story, misha's name came up and i said that's interesting.him? they said oh, yeah we knew him quite well. he was hanging around. we didn't -- you know we thought he was a very nice harmless guy. we don't understand why the tsarnaevs are saying these things about him. then i asked if they knew his name and they said they did and he live edd in rhode island. there's only one person by that name in rhode island. there are not very many armenians who converted to

islam. and he confirmed that detail to me when i saw him. again, there's this physical description that matches. when i arrived at the apartment, i almost -- they understood immediately why i was there. i identified myself as a journalist. >> you were able to communicate fully in russian. i'm correct, right? >> we spoke a lot of the time in russian. sometimes he spoke english. he speaks very good english with a rather pronounced russian accent. his parents, with his parents i spoke almost entirely russian. >> all right. now one thing i want to ask you about -- you had a conversation about how well he knew the family. we've been hearing these different family members saying misha this misha that that has led to this outside perception. he never met tsarnaev's family members but obviously the suspect's mother said he was in their home praying with them. here is what she told our nick peyton walsh. >> when misha visited us we just kind of -- he just opened

our eyes you know really wide about islam. he was really -- he was devoted and very good very nice man. >> so what do you make of that? he's saying he never really met the family members and she's kind of going into detail about his devion to islam. >> i have to clarify a little bit. what he told me was that he had not met the uncle. >> okay. >> uncle ruslan and the brother-in-law inkhstan who accused him of radicalizing tamerlan. he definitely knew the mom. he didn't deny that. what he denied is that he had some kind of radicalizing influence on tamerlan. >> when you talk to him about islam and his beliefs in islam, what did you come away with? >> well i came away with a sense that he was certainly very sincere in his beliefs, but i covered the wars in iraq and afghanistan.

i've met a lot of jihadis. this guy did not give me the impression of being an islamist extremist. his american girlfriend was sitting there on the couch in her shorts. admittedly i surprised him on a sunday at home but she was not wearing hijab. she was not, in any way, kind of confined from speaking with me. look erin this is a very superficial impression i completely admit it. i have to emphasize that this was not a formal sit-down interview interview. i surprised these people. they were very upset and agitated and i tried to ask a lot of questions about all of the things we want to know the answers to. and they just didn't want to go there. so the story is not over. there were a lot of questions we still have to answer. >> but at least you have a sense of this person better than anyone else. we appreciate you sharing it with us. thanks christian. >> thanks. authorityies tracing the suspect's activities in the weeks before the bombing are now focusing on the tsarnaev brother's home in cambridge, that small apartment we've been

talking about. if as suspected, they planned the bombings in that apartment, did they leave behind crucial evidence as to where or from whom the explosives came from? paula newton is "out front." >> reporter: the flags are lowered even on norfolk street the place the tsarnaevs called home. sobering reminder that this isn't over. there is still much to learn about the suspected bombers and their motives. >> you know my window looks over their bedroom window. >> reporter: for mary silverman, the mystery started when she wasn't allowed go home. >> law enforcement said you can't go in. i said why can't i go into my house? he said we're afraid of explosives and then i was thinking that they made the explosives inside the house. >> reporter: silverman is terrifyingly close to where the suspects could have put together their plan and their bomb. >> middleblinds are always drawn over there? >> always.

never had them open. seemed odd to me. >> reporter: the fbi has confirmed to cnn they are still on the hunt for explosives and still questioning people. a short distance away -- >> i can see a bullet on the left of that window in the second floor. >> and you didn't even know? >> no we didn't notice that. there was so much shooting. >> reporter: she shows me where the stray bullet pierced through her sitting room. >> right through this wall. >> through that wall and then buried in a sofa cushion. police took the bullet away telling her it was one of 69 stray bullets that hit homes and cars as police battled their way through a bloody shootout with dzhokhar and tamerlan tsarnaev. you can still see the damage from that kind of fire power here. they were pinned down from police and still lobbying explosives at them. there are so many questions in

this investigation. where did they get the bombing material? how and where did they put those bombs together and crucially, did they have any help? >> really really scared when i heard explosions. >> reporter: she says she left never imagining it would follow her to her new home. she has the same thought that must be nagging at police. >> i think it's really hard for two boys to plan all that on their own. >> reporter: you think they must have had help? >> i believe so. >> nowpaula, do you know what investigators have found so far in terms of evidence from the explosives? that is, quote, unquote, the holy grail for them right now. >> reporter: two very important locations. one not far from here where the bombs went off. that shootout on laurel street. erin the fbi made very clear to me look finding out where those explosives come from are a huge part of this point to whether

or not there are other people involved in this plot. is there some kind of bombmaker out there, either in the united states or perhaps even in russia that they don't know about? that bombing signature, erin is so crucial at this point. they in terms of executing any search warrants right now have not found the missing link to tell them definitively where the bombs were made. and in trying to re-create these things they don't work that often. very often you have to test them. that's part of that investigation, too. >> the testing and dna they found there as well. thanks very much to paula. dramatic rise in female suicide bombers. of course as you know the mother tsarnaev brother's mother quote, unquote, a person of interest. we'll bring you our investigation into the black widow, women responsible for the most violent and deadly terror attacks in the world. trapping thousands of workers, the rescue team makes a dramatic decision.

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chechnya one disturbing trend, in that part they actually have a for them there. they're called black widows named that way because some are wives of insurgents killed by government forces who themselves then take up the cause and become suicide bombers. nic robertson is in dagestan with an "outfront" investigation. >> reporter: in dagestan's capital last may, an inferno. moments earlier, a female suicide bomber known here as a black widow detonated a bomb at a police checkpoint. minutes later, another blast. the following day reveals the full horror. the black widow's brother, driving a car bomb blew this fire truck apart. callous timing killing the emergency service workers just as they arrived to put out the flames. a brutal conflict spilling over from neighboring chechnya playing out as tamerlan tsarnaev

visited his parents here last year. this is the same checkpoint. we can't stop here. back then the attack struck fear into the security services and according to local journalists for awhile police were too afraid to patrol. russell, a defense lawyer tells me russian authorities are handling the female bombers all wrong. >> it's not criminal problem. it's social problem. >> reporter: it is a problem that has been around over a decade involving wives of rebels killed by government forces. when a woman's husband is dead she has no rights. she can't have a lover or boyfriend. she can't make any decisions. that's why, if she's religious, she becomes an easy target for suicide recruiters. >> reporter: october 2002. 40 to 50 armed chechen men and women took more than 800 hostages in one of moscow's principal theaters. it was russia's capital's

deadliest modern day terror attack and the so-called black widows took a leading role ready to die, detonating huge piles of by the time the three-day siege was over more than 170 people including all the attackers, were dead. in 2010, two female suicide bombers attacked moscow's subway. at least 40 people were killed. one o attackers, a 17-year-old, fit the black widow profile perfectly. her husband, a rebel leader had been killed by security forces a few months earlier. she also represents a changing face of the black widows. she's from here in dagestan not neighboring chechnya like so many of the black widows before her. it signals a shift in the battle front. the so-called black widows are not holback.

this attack closed the dagestan's capital, killing five policemen in march last year. a war with women in it unfolding around tamerlan tsarnaev and his mother. >> nic, unfolding around tamerlan tsarnaev and his mother. according to the house foreign affairs chairman royce, she's a person of interest. we have absolutely no idea as to her involvement, if there was any, but obviously law enforcement is looking very closely at her. would she fit the profile? she was estranged from her husband, is now back with him, but obviously if involved wasn't doing anything herself, would have been more leading and manipulating. >> reporter: there is certainly evidence of that in other conflicts where women have played this kind of role. she is perhaps older than the sort of average black widow age, somebody sort of perhaps in their late teens, their early 20s, somebody who is relatively vulnerable in society. zubeidat tsarnaev doesn't really

come across as somebody who is vulnerable. but certainly, she has come across with strong opinions and it is people like that who have been influential on men in their families in the past erin. >> nic, are women suicide bombers more effective than men? >> reporter: they certainly create a lot of terror here. there are two reasons for that. women in society here are generally sort of left to one side if you will. men don't really speak to them. so there's an ability there to sort of come into a situation where men are at a police checkpoint and they wouldn't suspect a woman necessarily. and that's why it creates sort of such terror with the security forces because women are ignored and they're not looking at them as potential attackers, so that's one of the reasons here why they're an effective tool for the rebels. >> thank you very much. reporting live from dagestan tonight. "outfront" next the essay. something the left and the right can agree on.

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rescue workers have called off a search for survivors in bangladesh today. last week the eight-story complex collapsed, trapping thousands and killing hundreds of garment workers. most of them were young, impoverished women. it could have been avoided. officials say the complex was built on spongy ground without the right permits and the building's owners ignored massive cracks. the government in bangladesh has vowed to investigate conditions at the factories and the retailers that use that cheap labor like walmart and the gap have set aside money to improve safety. yet we've heard this song before. hundreds have been killed in similar disasters over the past decade every time we hear it's going to stop. it has become obvious that the government and retailers cannot and will not police themselves. bangladesh has about 4,500 garment factories which account for 80% of the country's total

exports. they're not going to do anything that gets in the way of that. in november when we told you about a factory fire in bangladesh that killed 112 workers, we said it was time for stronger unions to protect the rights of the workers. we needed that in the beginning in the united states, too. now with another 400 dead it is more important than ever. will it finally be the time? thank you so much as always for watching. see you back here tomorrow night. "ac 360" starts right now. good evening, everyone. nba hall of famer charles barkley, kenny smith and omeka okeafor join us for a history-making night in pro sports. pro center jason collins becoming a true pioneer, the first big league male athlete to say he's gay. also tonight, breaking news. female dna found on the boston bomb parts. female dna, as the fbi takes dna samples from the home of the dead suspect's widow. we begin with that ground-breaking day in u.s.

sports. nba center jason collins today became the first active player in a major american team sport to come out publicly. the 34-year-old free agent made the announcement in an essay for "sports illustrated." the fact collins took this step on his own makes the news more