>> he said, quote, the -

>> he was once a kgb agent, bu turned into a local critic o russia when he was poisoned an london and made headline around the world a lethal toxin in a cup of tea >> it was a dirty bomb >> why was he killed to unravel the mystery, we follow the tail of a darke conspiracy >> are you threatened for your life >> we will meet and confront the prime suspect. >> did you put - in the teens >> and now, is the dange coming closer -- >> one man said shoe temp. >> an attack on the expert helping us with the story. >> people say this is neve going to happen here i know it can happen, here because it happened to m husband. hello, and welcome to dateline former russian agent alexander --

was a vocal critic of th russian government, but in his world access to informatio could make you a very rich man or a dead one. his murder set off a international investigation to discover who wanted hi silenced here's richard engel with sp games. >> a former russian agent, poisoned a multi millionaire found dead in his bathroom. an investigative reporter, executed in front of her home. their lives had been interconnected but what about their deaths? random acts? or as some suspect, part of an international murder conspiracy that stretches across tw continents and several world capitals we'll investigate who wanted them dead and why. the case will take us from

moscow two rome, two london, into a world of spies and sp catchers of corruption and those wh dare to expose it. a world in which murder happens, often. was there a hit list in my >> sure that there was >> but our story begins closer to home. on a late, winter evening, pau joyal, an intelligence analysts, was driving to his house jus outside washington d. c. it was quiet and dark. >> i got out of my car there were two men waiting i the bushes they jumped me one man i fought with. and we ended up on the groun in a tussle. and this one man said to someone outside i didn't see shoot him. so, i covered my heart with my arms and i turn to the side. and i was shot went through me >> one shot?

>> one shot and then i heard the click -- >> another click >> right, and nothin happened >> so your shot once, rollin to protect yourself. >> i hear a chamber to clear it the gun jumped at that point in time, the lights went on in my house joyal's wife elizabeth heard the commotion. >> all of a sudden i hear shot and that just flipped m up i knew it was a gunshot. i knew it was a gunshot and knew it was close. >> she opened the door and saw her husband. >> he's wearing a raincoat, suit, a hat. and he's doubled over and yo can see that he is in pain he looks at me and says, i'v been shot. >> the assailants had four out fled elizabeth got joyal inside and called 9-1-1 >> as soon as that 9-1-1 cal was done, i asked my son t lift my legs up.

because i wanted to make sur that the blood was stays in th body >> you don't lose consciousness. >> elizabeth is a registered nurse. her training kicked in >> there was no signs of external bleeding at tha point. so, that kind of freaked me out, to as a nurse, i know if it's not bleeding on the outside it's bleeding on the inside >> an ambulance arrived an rushed joyal to the hospital the nine millimeter bullet had torn through his bladder and intestines they had to place him in a dru induced coma to see if his life he was unconscious for a month local law enforcement initiall assumed the shooting was a botched robbery. but elizabeth joyal believed otherwise. >> i didn't want to seem lik this crazy conspiracy theory woman. but i knew that it was not a carjacking there's just no way. that it was just some random guy. it had to have been a planne attack >> because nothing was stolen. the assailants had clearly bee lying in wait. which is why when joyal came stumbling into the house with bullet wound, he told his wife

to call his business partner a former russian spy master. >> i warned him, i was shot. >> so, if you're warning you russian business partner tha you've been shot you clearly didn't think the this was a botched robbery o car jacking? you thought this was related t your work? related to your russia connections? >> i don't think there's any doubt. >> someone had tried to kill him, just like the other guy i london >> the other guy a former kgb agent and frien of joyal's killed three months earlier in london. assassinated with a weapon s frightening and exotic investigators almost missed it a weapon that raise the specte of state sponsored murder. >> coming up - we trace the steps of mysterious attack from bus t barr, to deathbed. he >> was going throug unspeakable torment. >> when "dateline" continues >> in a few minutes will lan in london's heathrow airport >> we don't know why and who was behind it. >> american intelligence exper

paul joyal eventually recovere from his near fatal shooting in january 2015, he traveled with us to london to tell us the story of what happened t an important contact of hi just a few months before joyal was shot he was join me in the finish 24 hour challenge. start by cooking a lasagna.

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in london's heathrow airport >> we don't know why and who was behind it. >> american intelligence exper paul joyal eventually recovere from his near fatal shooting in january 2015, he traveled with us to london to tell us the story of what happened t an important contact of hi just a few months before joyal was shot he was >> he was a law enforcement officer. work for the equivalent of the fbi. >> in counter terrorism? >> anti-corruption was what he was most interested in >> his name was alexande litvinenko sasha, to his friends. but his interest in fighting corruption had made him a lo of enemies including in his own agency, the kgb, which was renamed the fsb. litvinenko was forced to fle russia with his wife and son and seek asylum in london, where he quickly caught th attention of agents of the british intelligence service mi6.

trenear - harvey was a forme mi6 mi6 analyst -- the british wanted to for find out what he knew about hi former colleagues in the russian secret service was he credible? >> oh, yes he. was >> credible enough that mi eventually began paying him monthly salary trading information for mone was one-way for a former russian agent to make a living and his new home in london then suddenly, in 2006 litvinenko who had always been fit and healthy, got very sick >> it was just incredibl strong and heavy sickness. just suddenly and not stopping >> litvinenko wife marina mari watch him weak waste away in just a matter of days. >> oh, it was awful. his here started to -- >> to fall out >> yes, and he started to look like cancer patient treated by chemotherapy >> i knew he was going through unspeakable torment. >> finally, they found in hi blood. he might have been poisoned. >> why isn't doctor suspected maybe he ha ingested thallium.

commonly found in rat poison and treatable with and antidote >> finally finally, we know what happened to sasha and now we are all under control and he will be safe. >> but it wasn't under control the antidote didn't work did litvinenko it get better he got worse before long, even close friend like andrei nekrasov could barely recognize him >> at possum point i said to myself, why should this be

happening to this young, healthy, and some, athletic man? what is going on >> he's fighting for his life. >> a fight litvinenko woul lose >> we're sorry to announce tha alexander litvinenko died at university college hospital at 9:21 on the 23rd of november 2006 >> but in the days just before his death, litvinenko di something remarkable he knew he was dying and decided to help scotland yar detective solve his murder he gave them a series of deathbed interviews. the transcripts provide remarkably detailed account of his movements on that day he was poisoned litvinenko's i can't start a

aa 10 am when he received phone call from an italian contact, mario scaramella, who just arrived in london, an insisted he needed to meet litvinenko immediately he said he had urgent news they agreed to meet that afternoon. at 3:10 pm, litvinenko and scaramella, were spotted on security camera walking west o the street they came to this sush restaurant, where litvinenko ate lunch. scaramella said he wasn' hungry litvinenko and scaramell parted ways after lunch, and a 3:48 pm litvinenko is caught o another security camera talkin on his cell phone. litvinenko then walked about a mile to the millennium hotel which is literally right acros the street from the u.s. embassy. it's that modern looking building over there. this is one of the most secure

neighborhoods in all of london one of the hotel securit cameras recorded litvinenk arriving in the lobby at 3:5 pm he was there to meet andre lugovoi, another former fs agent. seen here wearing a black, leather jacket lugovoi had his own security

consulting firm. he and litvinenko have bee talking about doing some business together in london. the two had met several time over the past year this time, lugovoi brought along a buddy. a man name dmitry kovtun he's the one in the blac turtleneck it was a quick meeting litvinenko drink just half a cup of tea then left around 5 pm, he caught a rid home that night, he fell ill. and three weeks later, he wa said so, who slipped litvinenko poison that day? putting his murder into motion litvinenko told scotland yar detectives before he died, h didn't know when or who ha poisoned him but he had no doubt that one o more of the man he had met tha day, the two russians or the italian, was his killer. naturally, we wanted to talk t all three. >> coming up - we track down the first suspec litvinenko named >> are you frightened for your life >> when "dateline" continues or an unbearable itch. this painful, blistering rash can disrupt your life for weeks. it could make your workday feel impossible. the virus that causes shingles is likely already inside of you. if you're 50 years or older,

ask your doctor or pharmacist about shingles. no two bodies are the same. some pads, never got that message. but, always flexfoam did! it protects against different flows for up to zero leaks. and it flexes to fit all bodies, for up to zero feel. feel it yourself with always flexfoam. nexgard is the flea and tick protection that's #1 with vets. your vet trusts it for her patients... ...and her own dog. plus, its delicious beef flavor is #1 with dogs. use with caution in dogs with a history of seizures or neurologic disorders. ask your vet about nexgard. >> alexander litvinenko, the

former russian agent, the ma friends called sasha, died without knowing what kille him. the results from a battery o tests came into late that they did come in. it turned out he was killed by something far more lethal than common rat poison. >> it's polonium >> polonium 210, to be exact a rare and deadly radioactiv isotopes the news shop the world even though most people were exactl sure what polonium was but paul joyal knew what it wa and what it could do that his friend effectivel burned to death from red activity

>> it's a horrible death it's a gruesome death. he lived longer than any man normally would under those circumstances. and he lived just long enough, within 12 hours long enough, for them to finally determin that it was polonium versu something else >> why if he had died 12 hours earlier would it had made an difference >> because they wouldn't hav found out. they would've marked the death certificate, as death unknown. he would've been put in th ground it would've been just mystery. unknown assailants turn a page. move on. >> it's a key of this murder polonium 210 was discovered. and now we exactly know what sasha was killed by. >> it's an almost perfec murder weapon. polonium has no smell, littl taste, and without specialized

equipment, it's undetectable the amount that killed litvinenko slipped int something he ate or drank, was no larger than a green assault that still 1000 times th lethal dose. and that tiny bit of poloniu would've been enormously expensive. >> eight to $12 million to b able to get the portion that went into him. >> the who could get hold of such an expensive and exotic weapon and how did they deliver the fatal dose when detectives went step-by-step with litvinenko through the day he was poisoned, he named three potential suspects the two russians and the italian. the first one we found was the italian. in rome we're on our way to se mario scaramella who hopefully can shed some more light on wh killed alexander litvinenko, and why. scaramella has been a hard man to pin doubt first he wanted to meet us i naples, then new york, the london he. finally agreed on rome and wil have to find out why he ha

been so skittish >> [speaking italian >> how to describe scaramella? he's a lawyer. an academic. a security analyst and also someone litvinenk never completely trusted scaramella, you'll remember, i the contact litvinenko met a the sushi bar on the way day h was poisoned >> litvinenko thought yo poisoned him >> yes >> you didn't poison him >> absolutely not. >> from his perspective, i does make sense. >> no, sure. everything is very strange >> had scaramella been working for the italian government and sometimes used litvinenko as a source for investigations into the russian mob and spy rings. he was giving you names of russian mafia members? >> yes >> you are connected to th intelligence service >> exactly >> something that was short to upset both the mobsters and th fsb. scaramella told us that in

october, 2006, the month befor litvinenko was poisoned, h began receiving frightenin emails the final message arrived on the very day of his last meeting with litvinenko. and what did that message? >> look, there are people read to kill you. >> the emails amounted to a hi list the next name up - >> alexander >> as in, litvinenko scaramella says that's why h met with litvinenko in london. to tell him about the hit list to warn him. but he says litvinenko didn' buy it >> he said, mario, don't car about that - >> he says it's b. s.? >> i think it's just a provocation. but please check on. >> but after what happened t litvinenko, scaramella says he takes the hit list seriously are you frightened for you life >> well do you have anothe question [laughs] >> scotland yard questione scaramella and eventuall cleared him. why? because if you're looking fo it, polonium is traceable. using specialized equipment, investigators were able to track it in people and i places >> once polonium 210 had bee

identified, then across europe like the slim from a slug al the way across, polonium was popping up everywhere. >> but not in scaramella no polonium in his body or anywhere he had been so, scotland yard took a har look at the two russians lugovoi and kovtun when detectives retrace thei steps, they found polonium contamination everywhere >> we see the same fingerprint of the polonium in multipl places where they were >> business offices. hotels a hookah bar, a strip club, soccer stadium, and th millennium hotel's pine ba were they last met litvinenko.

that's where investigators hit the jackpot. these 3d graphics put together by scotland yard show th entire pine bar wa contaminated with polonium with extreme hotspots on a table and cheer. and the levels found insid this teapot, off the charts. paul joyal wonders how man people were unwittingly expos. >> do we know ultimately wha the final cost of this use o polonium is? someone who is washing dishe in the pine bar, or in a hotel cleaning crew? >> five months after's death scotland yard issued an arrest warrant for lugovoi. kovtun would come later. the two responded with a press conference in moscow, statin their innocence. >> [speaking russian

>> russia refused to extradite them so we travel to moscow to find the men who were wanted in connection with litvinenko's murder >> coming up - the stakes get even higher a we confront the top russia official when "dateline" continues. i think you were supposed to keep left there. hmm? what is this place? the other side of the rest stop. bundles as far as the eye can see. if you're looking for a first mate, i know a guy. me. i'm the guy. is this oak? [ sniffs ] four types of jerky. this is where i live now. you could save a ton with progressive by bundling your boat or rv with your home and auto. hey, guys! free bags! they're just giving them away! my mental health was much better, but i struggled with uncontrollable movements called td, tardive dyskinesia. td can be caused by some mental health meds.

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top stories, the federal judge in texas suspended the fda's approval of a widely use abortion pill. soon thereafter that, anothe judge in washington stat issued a contradictory rulin saying that the fda must mak the drug available in at least 18 states. conflicting orders are likel to move up to the suprem court. a new batch of classifie documents that appeared to detail your secrets on ukraine the middle east, and china the pentagon is alarmed by the

findings and investigating tha leak now back to dateline >> in the dead of winter, 2015 we arrived in moscow, in effor to find out not only who kille former russian agent alexander litvinenko, but why. this is home to andrei lugovoi and dmitry kovtun. hunted by both scotland yard and interpol, suspected of killing litvinenko around the world, they wer villains in a tale o international intrigue and murder yet here in russia, we found plenty of people who thought i the two did kill litvinenko, h probably had it come in coming >> thank you very much for talking to us. >> in the duma, russia's parliament, the pugnacious leader of the ultra nationalis party has nothing but disdai for litvinenko >> who needs this little petty

person he was just a piece of rubbish >> vladimir zhirinovsky told u that here in russia, litvinenk made plenty of enemies going back years back in the 1990s, russia wa in chaos after the collapse of the soviet union it was a time when enormou fortunes were created an outrageous crimes committed, sometimes by the very people sent to investigate them back then, alexander litvinenk was a young fsb agent wh claimed to be disturbed by wha he saw >> litvinenko specialized in organized crime investigations but became obsessed with wha he believed to be corruption within the fsb crimes committed by the cops he compiled a dossier, complet with flow charts, detailing hi allegations. and presented it personally to the head of the agency and the result was >> opposite. >> surveillance on your family >> exactly

>> an outraged litvinenko no did now do the unthinkable he led a nationally televise press conference a group of agents, several o them in disguise, claiming the fsb had become corrupted b russian mafia money. litvinenko even claimed he had been ordered to assassinate prominent billionaire, boris berezovsky but instead, warned him that his life was in danger >> the essential motivation of this very simple man was his feeling that his country was being betrayed by th leadership >> he believed he didn't d anything wrong he was a good officer. >> he didn't think it would ge him in trouble >> he said, they will kill m or they will arrest me >> he was jailed for nin months but that billionaire he ha warned, berezovsky, bailed him

out. and helped litvinenko and hi family flee to london. there, litvinenko kept up th drumbeat of criticism agains the russian government he even wrote a book accusin the fsb of starting a war in chechnya for political reasons. in response, russia brande litvinenko a traitor his image used for targe practice by russian specia forces this wasn't just symbolism in march, 2006, eight months before litvinenko's murder, th russian parliament passed a la authorizing the liquidation of enemies of the state, anywhere in the world >> they don't pass that just for the sake of passing it you have to have somebody in mind >> seven months after the la was passed, someone wa liquidated a prominent russian journalist shot in the head outside her moscow apartment she was a friend of litvinenko three weeks later, litvinenk himself was poisoned wit polonium 210

duma leader, zhirinovsky certainly did shed any tears when that happened but last of the notion that the russia state with connected in an way. fourth one simple reason he thinks russian agents would have done a better job >> and surprised that the uk special services and the u court accuses russia that with a bag of polonium they came to london and we're just throwing it around. >> it just doesn't make sens to a lot of people that russia didn't kill him. >> for 100 years, the russia special services have been using that kind of substance for killing people that yo never will be able t recognize. why do we have to go into some kind of bar and put it i someone's tea cup and everybod is laughing at us? i mean, the state cannot b emboldened >> litvinenko's friend pau joyal, who believes he was a target of a botche assassination, agrees that i some ways, litvinenko's killer were indeed clumsy and careless but he says, that's becaus

they were probably just pawn in a much bigger game. >> you think that any of the do you want that substance was you think that they knew tha they were giving him polonium? >> why wouldn't they have know their handling >> because you don't want them to know? >> but they could've done better job of not spreading it over the case. >> if they knew, they also might see no there's no way i'm going to do that >> i don't want to handle this radio active - >> i'm not going to kill mysel in the process >> to get closer to the trut about who killed litvinenko, w had to talk to the suspect themselves andrei lugovoi and dmitr kovtun in kovtun's case, it was a easy a few weeks after litvinenko died of polonium poisoning kovtun was hospitalized an lost all his here. he hasn't been seen publicly since 2012 that left lugovoi. when we got here, he didn' want to speak to us. but on the second day of our trip, he called and said he wa ready to talk.

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is strong enamel- nothing beats it. new pronamel active shield actively shields the enamel to defend against erosion and cavities. i think that this product is a gamechanger for my patients- it really works. >> meet andrei lugovoi one of the men scotland yard believes conspire to poiso former agent alexander litvinenko we've been negotiating a interview for weeks. he agreed, then backed out

then finally, sat down with us what did you think o litvinenko were you friendly. would you consider yoursel friends? >> i have always said that w have never been friends. he was a very complicate person slightly crazy, i would say. he was given to conspiracy theories to blowing things up out of al proportions. >> he and litvinenko both used to work for the fsb. both had served time in jail it was a bond between them had lugovoi done very well i business after that and open a security consulting firm he says he and litvinenko me several times in london to discuss doing business there together including that now infamou meeting in the pine bar, wer scotland yard says litvinenk was poisoned lugovoi says the meeting was n big deal so what do you remember abou sitting there at the table >> i remember that we talked with litvinenko about nothin in particular. and now for eight years, i a

under suspicion. >> your under suspicion becaus the investigation says there was polonium in that tea pot did you put any polonium in th tea? >> of course not i was tested for polonium and tested positive. did i put polonium into myself am i an idiot? am i crazy >> but scotland yard's detectives don't believe lugovoi's denials. in fact, they think he tried t kill litvinenko more than once that's because they foun polonium on the table in a conference room where he and litvinenko had met two weeks before the pine bar encounter. was anything spilled on th table? >> richard you're asking questions. i remember some things i don't remember other things. i cannot answer these question because these can be use against me in a court, which i done frequently.

>> as for his last meeting wit litvinenko at the pine bar lugovoi says there is no way h bought polonium on that trip because his wife and childre were with him. >> a persons we can spot is hi family and i'm a rational man even if i had taken part in an operation, even if i had known what was in a container, would i take my family along i'm a rational man i couldn't do it >> not only did he continue to maintain his innocence, he offered his own theory about who poisoned the teeth could someone have put something in there without you noticing >> no. why don't you think th polonium may have been put there into the cup after our meeting, the next day. or by a guy from mi6 he brings the polonium and pours it into the cup. that's agatha christie stuff >> mi6 is british intelligence lugovoi says perhaps the brits

killed litvinenko to embarrass russia retired mi6 analyst trenear harvey says that's nonsense. if for no other reason because mi6 would never use such a expensive weapon to kill anyone >> if the british wanted t kill him, they were he would'v followed out of the hotel room he would've been place in fron of a car we wouldn't we would've spel $12 million in a slightly more cost-effective fashion >> you would've made it look like an accident >> indeed. things are done less extensively, more cost effectively. the old fashion bullets an bodies, work rather effectively, quite cheaply. >> why not to shoot him? >> i didn't say they would'v then could possibly we can do that sort of thing >> also remember litvinenko was working for mi6 and it was lugovoi at hi partner dmitry kovtun who left a radioactive trail all over london especially at the pine bar

lugovoi is hardly hiding her in russia. he did our interview in one of the restaurants that he owns he's a member of parliament. and he's even become something of a pop culture icon. hosting his own tv show. the program program, appropriately enough, called "traitors" it names and shames individual who are supposedly enemies o the russian state. lugovoi's high profile here is just one reason that man people who suspect him o murder don't think he acted on his own. another reason, all of the polonium 210 in russia is unde the control of the state >> it's impossible to use state controlled substance lik this without the knowledge o the very top of the country. >> because you're unleashing a radioactive substance? it's almost a tiny little dirt bomb >> it's nuclear terrorism. >> of all his enemies, litvinenko may have infuriated one more than any other. coming up -- >> i have said that this is

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another man who is convinced his life is in danger. akhmed zakayev is a wanted man in russia. a rebel leader from th breakaway chechen republic and a close friend of the former

kgb agent, may alexander litvinenko, who he says give him an important piece o advice never trust old friends. >> he said, some will will com from your past but you shouldn't trust him. because he will be your killer >> sasha told you? that >> sasha told me. >> which maybe what happened t litvinenko after all, andrei lugovoi was person from his past but as we've seen, there were number of people i litvinenko's past who may have wanted him dead. the fsb colleagues h denounced. the russian mobsters he wa investigating. perhaps someone who thought he was a traitor for working with british intelligence for years now, litvinenko widow, marina, has been asking how bi was a conspiracy who was behind it? how high did it go dangerous questions that she knows better than anyone >> you think you play chess,

but they play russian roulette >> those who were closest to litvinenko believe the kil order may have come from the very top because litvinenko picked fight with the wrong perso from his past. none other than russia president, vladimir putin. >> sasha was on a mission. he was trying to prove that is that putin is as corrupt a anybody. >> the mission may have starte years before when litvinenko made that flow chart o corruption in the fsb. the head of the agency at th time was putin after litvinenko fled to london, and putin became president o russia, litvinenko attacked him, relentlessly and by name. >> i and others said that this is a very dangerous thing to d because your personalizing this >> you told him that >> yes

>> but marina and others believe that the ultimat motive may not have been personal at all. rather it was all about money. we learned that in 2005 an 2006, litvinenko made multiple visits to spain, helping prosecutors take down a majo organized crime ring one that litvinenko publicly claimed had financial ties t president putin. putin's office has never responded to that allegation anne applebaum, a pulitzer prize-winning author, an exper on russia. >> i think that anything litvinenko was doing that came close to the source of putin's personal wealth, would hav been by far the most dangerous thing that he could do >> in addition to a possible motive, there was also the means. paul joyal says the fact tha polonium was used to kil litvinenko, leaves little doub as to who authorized the murder >> so, does that mean it would have to be putin it could've been someone els

with access to - >> come on, you're not going t engage and an active nuclear terror lower terrorism i downtown london withou knowledge of the president >> we begin the open hearing into the inquiry into the deat of alexander litvinenko. >> in january, 2015, a publi inquiry opened in london it was a victory for marina, who along with her attorneys for an eight year legal battle to make it happen. on the opening day, he attorney argued the evidence leads to one disturbin conclusion which litvinenko himself reach before he died >> mr. litvinenko came to th awful awful realization that h had been the victim of a political assassination by agents of the russian state. >> an expert witness testified the polonium that killed litvinenko could only have com from russia. president putin's spokesma declined our request for a interview. and in march, 2015, putin gave lugovoi a metal.

the order of merit to th fatherland, second class, fo his work in the duma you think russia will ever com clean and this will be known >> i believe, one day we wil know this. it will be very obvious fo people to decide >> and there years she's bee looking for answers, other questions have multiplied, other deaths have been recorded there was boris berezovsky, th russian oligarch litvinenk said he refused to assassinate another prominent critic o putin. in 2013, he was found dead i his london home. originally called a suicide, a judge said he couldn't rule ou murder >> the way he killed himself - >> he hanged himself with scarf? >> a scarf, in the bathroom. and the fact that his bodyguar was not there. it raises questions. >> in february, 2015, anothe putin critic, boris nemtsov, was gunned down in the shado of the kremlin the victim was about to lead a major rally against putin.

it went on without him five chechnya nationals were arrested and put on trial. they have denied denie involvement in the murders >> nemtsov's party colleague vladimir kara - murza suspecte putin loyalists were behind th assassination. >> people should not be killed for their political activity because they happen to disagre with the government. the leader of the russia opposition, boris nemtsov wa killed, gunned down, because h opposed the putin regime for no other reason. >> putin's office has denied involvement in nemtsov's killing. less than three months after nemtsov's murder, kara - murza himself became the target of a assassination attempt. in may 2015, kara - murz suddenly became violently ill. what was initially thought t be heart problems turned out t be poison. kara - murza recovered but in 2017, he was poisoned again. >> i woke up because my hear

was racing my heart because just gettin faster and faster and faster >> you woke up to this feeling >> yeah. >> i don't think there are words to describe this to describe how you feel whe you're trying to breathe and you cannot when you just slowly feel your whole body just giving up. >> this time, he barely escape with his life and spent almost two weeks in a medically induced coma he has never found out how h was poisoned who do you think was responsible? >> i can only presume that thi is - this was done by people with a least, with connections to the russian special services >> the kremlin has denied an involvement in kara - murza' poisoning. since the 2016 u.s presidential election, a numbe

of russian diplomats and operatives have been killed or died under mysteriou circumstances around the world in march, 2017, the u.s. senat held hearings on russian involvement in the election. >> the american people need to fully understand the threa that we face and what we mus do to protect ourselves in the future >> the former fbi agent clin watts was called to testif before the committee >> follow the trail of dea russians there is been more dea russians in the past three months that are tied to this investigation, who have assets in banks all over the world. they are dropping dead, even i western countries. >> so much of this intrigue an violence may seem very far away that when nbc news consultan paul joyal was shot just a few miles from the capitol, he and his wife immediately thought i was a hit. a big reason the timing >> it's four days after of

accused the president of being responsible for the horrible murder of litvinenko, on you network. >> in early 2007, joya appeared in a dateline repor on the litvinenko case >> did putin ordering? >> did he know it. can't say that i would find it hard to believ that this information woul ever, has not filtered its way to the top >> just four days later, he wa almost murdered himself. do you think the related >> i don't think there's any doubt. >> people out in the general public say, oh, that's russia, it's never going to happen here >> but i know that can happe here, to i know that can happen her because i happen to my husband >> there is no proof the joyal all right. but paul's assailants have never been caught. and elizabeth joyal admits a four she was angry when he agreed to be interviewed again for this program >> i said, what are yo thinking why do you want to bring notic once again but then when the man in russi

was shot, i had kind of an epiphany i was like, wait a minute. someone needs to talk abou this someone needs to say, this i not right. >> can i ask you an obviou