i don't understand why he did this. >> they may never know. neither rowe or his lawyers responded to dateline's request for comment . through it all, the circle of friends has stayed bounded. they thanked christy for that. >> i would like to think christy has kept us together. >> we almost feel guilty we were able to get married and have kids. we think of christy that she never got to have that. >> she was a huge light in this world that was taken away too soon. way too soon. >> that is all for this edition of dateline. i am andrea canning. thank you for watching. hello. i am andrea canning. this is dateline.

>> she did not deserve this. kill someone over months and months and months. there were a lot of ways to kill someone. i've never seen anything like this. >> a devastating mystery illness. >> she was in a lot of pain. excruciating pain. spirit like a zombie. >> i knew she was gone. >> what was happening to this young mom? >> someone said, could this be a poison? >> this was the stuff used by russian kgb agents. >> who would even think of this? >> need to search the computers and phones. this was done on purpose. >> this evil came into our lives. how can this be?

welcome to dateline. brigida uto love to run and was hardwired to go the extra mile in everything she did. then, suddenly, her health collapse. doctors were baffled as her symptoms multiplied and grew more alarming. then, this kind pending mystery took a sinister turn. someone wanted her dead and thought they hatched a foolproof plan. could a physician and the fbi stop it in time? here is natalie with the prussian blue mystery. >> from the moment the ambulance arrived at the san diego emergency room in march 2018, the situation was frightening. and desperate. triage nurse laura comstock took one look at the young woman on the gurney and knew something was terribly, terribly wrong.

she was losing her vision. >> she couldn't feel her extremities her hands. she could not see the water i was giving her. >> the patient's name was brigida uto. she had just turned 28 yet she seemed to near death. >> at that point, she was very sick. >> probably the sickest patient in the er at that time. i told my coworker she my code on me. >> whatever was killing brigida was not evident. there were no bruises. no wounds. no obvious signs of infection. and yet, when the doctor examined her -- >> she was critically ill. >> so began an unusual detective story. the doctors had to unravel a medical mystery. soon enough, real detectives would be on the case too. at that moment. >> we saw someone almost -- did not have a personality. she could barely talk or tell

us anything. >> looking for clues, the doctor dove into her medical records. they were extensive. brigida had been suffering for months. nausea, fatigue. she had been in and out of doctors office and ers repeatedly. her sister said that illness would come on suddenly. >> she was violently sick. had to call out from work. sick for days. >> various doctors came up with their is from fibroids to cancer. >> there was one doctor who told her that, you have really bad menstrual cramps. she felt one of her symptoms that her ovaries were about to fall out of her body. she called me and told me this and she was crying. she said, i don't know what to do. i am frustrated because no one can tell us what is wrong with her. >> she had wondered if stress could be making her sick.

she had a toddler to chase around. a husband in the navy trying to find a new career. a new job teaching special ed. it was thrilling but overwhelming. doctors put her on medication for depression. then, she got sick again. >> she kept going to the doctors, and she kept feeling worse and worse and worse. she started losing a lot of weight. >> her mom felt helpless as her daughter's illness progress. were you getting more worried seeing your daughter waste away? >> yes. she was tired of going to the doctors and them finding nothing. she says, mom, i give up. i'm not going to doctors anymore. i said no, you can't. you have to go back. you cannot give up. she was not even walking normally anymore. >> when it seemed things could

not get worse, a disturbing new symptom. >> i went to see her. she -- her kitchen floor and she was crying to me. she said she pulled out a chunk of her hair. just in the shower. it came out. >> brigida's beautiful lock started falling out by the fistful. when you see her lose her hair, you think that was her most beautiful trade? how concerned were you? >> we were beautiful can -- we were very concerned. she said, mom, i need to go to the hospital. she said i can hardly breathe. >> she lived in a house next to her parents, and yet that morning, she couldn't see her way to their place. the pain in her legs so bad she could barely get into her mother's suv. >> i tried to help her by

raising her like, but even the touch was painful. she screamed. >> her mom raced her to the naval hospital. >> she said drop me off his clothes as you can to the entrance. [ crying ] i still remember i saw her walking. she walked like, you know, the walking dead. >> like a zombie? >> like a zombie. >> the navy doctors could not figure out what was wrong. her husband took her back to the family doctor who called an ambulance when he saw how sick she was. at kaiser hospital she was a doctor mystery painton -- patient. >> he saw her and said it's not right. from there the team was called. >> the doctor has board certification in medical

toxicology. a rare thing in an er. as it happened, his expertise would prove critical. >> i am a little more of a detective role. >> what was causing brigida 's here to follow not to mention the severe pain, vision loss, and weakness? >> the doctor said it could be lupus. >> she had this chronic, with the ring slow course. autoimmune stuff was on the list. cancer does not make you lose your hair. it's the chemo. >> the doctor knew we had to solve the mystery fast. brigida was fading. the clock was ticking. >> when i saw her and knew she was dying, she was in excruciating pain. i remember being in the hospital room and she was like, i want to be close to my sister. she put herself through and insane amount of pain to turn

her body so she could look at me. >> how close was she to dying? >> iwatch my sister almost die. i knew she was gone. >> a family's anguish deepens and the race to unravel this mystery shifts into overdrive. >> coming up. >> your daughter is getting weaker. she was losing her vision. >> she was losing everything. >> were her husband and son in danger too?

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natalie morales: here at kaiser permanente hospital in san diego, brigida uto was so weak she couldn't even conjure up the energy to care about what here at kaiser permanente hospital in san diego, brigida uto was so weak that she could not conjure up the energy to care about what was happening to her. doctors have a term for patients in this apathetic state. >> you have lost your hair and you cannot walk and you are wasting away. you are so sick to have the insight to say i'm really sick. >> that tells you she was as sick as she could get and possibly was near death? >> i think so. >> dr. lapoint did not know what was making brigida sick,

but to his toxicologist mind, her symptoms indicated she might have been exposed to a toxic chemical. he realized she might not be the only one. >> there are so many moving pieces. there's a child in the equation and a spouse. let's make sure we are observing them. make sure the child the safe and they have not been exposed. >> he had her husband and son admitted to a separate hospital for testing and for safety sake, he banned all visitors from brigida's hospital room. even immediate family . >> there was a time you did not know what was happening to your sister. did you think this might be yet? she might be gone already and they are not telling us? >> i was like a zombie. going through the motions. hoping she is okay. knowing if they had not call me to tell me she's gone, it's because she is still here.

>> olga is two years younger and they had always been close. >> we shared a bedroom when we were little. every night was like a sleepover. we did everything together. we were literally there for everything that happened. through our childhood, teenage years, delay. she was my go to person. >> their dad worked for u.s. customs at the border. they had grown up in rural san diego county. it's a safe, idyllic upbringing for your daughters? >> everyplace has dangers. over the years, we had a rattlesnake here or there or somebody came through and stole a pickup truck. there is danger but that goes with anywhere. you can't protect them from everything. >> from their dad, they learned caution. from their mom, they learned the importance of faith. >> i put them in catholic school. they teach moral values and things important to life.

>> brigida would beg to go to church during the week? >> yes. >> the little girl who beg to go to church grew into an accomplished young woman who ran cross-country and excelled in school. did she put pressure on herself to be perfect? >> she has always been that way. evening kindergarten, they would get a lot of homework. if she made a mistake, she didn't want it to show she had he raised something. she would start all over. >> near the end of her senior year in high school, she met a young man named race uto. a runner like she was. a great behind her but ambitious and determined to go to the naval academy. when did you first hear about race? >> i was 16 years old. she met him at a car show. she was doing it for the graduating class. he did not go to our high school, but he was there.

i remember her saying, i met this guy. i said, okay. i didn't think much of it because my sister did not take that much. >> as olga got to know him better, she thought race maybe the guy brigida needed. >> she was always into her books. she stuck to the rules. he took her to the adventurous part of her life. >> kind of got her out of her shell? >> i saw a different side of her when she was with him. >> race made it to the naval academy, but he suffered a hernia that never healed properly, and eventually, he had to withdraw without graduating. he did join the navy. in 2014, brigida and race married and very soon, she was pregnant with her son. everyone was thrilled when the baby came. >> we were all excited. we had a little doll. i would hold my nephew. we would take turns.

i would take care of him when she was sleeping. watching her learn and experience being a mom for the first time as she wanted to be, it was beautiful. >> then, just before her son turned two, brigida got sick. soon, she could barely pick up her child. your daughter is getting weaker and weaker? and she can barely walk? she was losing her vision? >> she was losing everything. >> in the hospital, toxicologist dr. lapoint developed a chilling suspicion about what was wrong with brigida . >> do you think? oh, my god. >> coming up. a rare and devastating diagnosis. >> highly toxic. >> it was your first case. >> growing danger at the hospital and a sudden alert at the fbi. i. sometimes, the lows of bipolar depression feel darkest before dawn. with caplyta, there's a chance to let in the lyte™.

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fonatalie morales: likete any good detective, dr. jeff lapoint was keeping his mind open, letting the clues lead him to a theory about what like any good detective, dr. lapoint was keeping his mind open. letting the clues lead him to a theory about what might be killing brigida. >> i've got to figure out what's wrong and get the treatment started. >> the symptoms could've been caused by range of toxic chemicals like arsenic, cadmium. but to the dr. lapoint one

particular symptom stood out. sudden hair loss. >> that's the telltale sign. any medical toxicologist, if you have a young woman who has lost her hair and now cannot walk because her feet hurt so bad, thallium will be on the list. it's straight out of the books. >> thallium is a heavy metal. atomic number 81 on the periodic table of elements. >> it was discovered late 1800s and quickly began being used medically early 1900s. it's a depilatory agent. if you had lice and you wanted them to lose their hair, you would give them thallium. >> for decades, thallium had another use. as an ingredient in rat poisoning. >> it was good for that. that was in the 1970s. it is good at killing things at the end of the day. >> highly toxic.

you never treated anybody else for thallium poisoning so this was your first case in front of your eyes. >> yeah. >> there was no quick way to confirm his suspicion. hospitals rarely see patients with thallium poisoning and do not have a way to test for it. >> no hospital will have a drop of blood to come back, thallium. you have to send them away. i'm looking at a two or three day delay. >> days he knew brigida might not have. >> we have a scary situation where i have a test infrequently ordered that i need now. that's a send out. it is serious and infrequently done and it is exotic. >> you are in a race against time. >> i am trying to advocate two different people. lots of hours on the phone to get somebody, this woman will die. when we sent the test, we said how do we get the antidote? >> he wanted to get ready to

give it to her when the results came in. >> it is called prussian blue. >> you've probably seen prussian blue and paint. it's a pigment since the 1700s. you can see it in vincent van gogh's starry night. it was not until 1965 that scientist discovered prussian blue could be used as an antidote. it works by speeding up elimination of certain poisons such as valium. while you can buy blue paint in any art shop, pharmaceutical grade prussian blue is nearly impossible to find. >> we started calling pharmacies around town. we called the navy. we called the local public health people. we got in touch with the cdc and found -- they are confidential storage sites and we found one. >> prussian blue is so hard to get because it's an antidote for radiation poisoning.

the u.s. government keeps it under close guard. stockpiled in case of a nuclear attack. >> no one wants to give an antidote before we prover. we do not throw around pressure him blue. >> we have trip where set up and this patient was in san diego. we were notified immediately of a prussian order. >> john gill is a special agent with the fbi. 's focus is weapons of mass destruction. a request for the antidote to thallium poisoning put his office on alert. >> the past several decades, there been instances for thallium has been used as an assassination weapon against former speiser dissidents. >> that's what you get this call is what is happening in san diego? >> that is something we were concerned about in the united states. >> all this just as trump is days away from a trip to san diego to talk about the border

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richard lui cia director may travel to israel this week for continued cease-fire negotiations. that's according to a source. he had been in qatar for most of the recent round of talks where hamas and israel reportedly remained at an impasse. is storm is moved out of texas following a deluge of rain. a 5-year-old boy dies sunday in the fort worth area after he was swept away by floodwaters. for now, back to dateline. . welcome back to dateline.

i am andrea canning. brigida uto was clinging to life in the icu. her doctor had a hunch she had been poisoned and core press raised alarms at the fbi. now her test results were about to solve one piece of the mystery. send the case in a chilling new direction. returning to natalie with the prussian blue mystery. brigida's mom could not visit her daughter in the hospital. no visitors were allowed. she waited and she prayed. that is all she could do. 30 miles away at kaiser hospital, dr. lapoint was waiting too. three days had passed since he sent out brigida's samples. brigida in pain the whole time. finally, the lab results came back just as he suspected.

it was thallium. a lot of it. brigida's husband and young son seem to be clear the toxic mental but she was in serious danger. >> her levels were off the charts. >> more than 1000 times the acceptable level. that is unbelievable. a hospital staffer had driven through the night to get hold of prussian blue pills. dr. lapoint started brigida on them immediately , but was so much thallium in brigida's system, dr. lapoint worried the prussian blue would not be enough to save her. he put her on dialysis to filter her blood. it was a slow process. when the fbi special agent arrived to question her, brigida was still desperately ill. how would you describe her condition at that point? >> she struggled with answering simple questions. >> he knew he could not wait. >> she looked bad and it's

concerning. at that point, we didn't know if she was going to make it. >> he needed to figure out how she had been exposed to thallium. brigida did her best to help. >> she brought up several points where she thought she could of been exposed. she received holistic medical treatments in mexico. >> or she could've been exposed at the school where she worked. it was an old army base in the could have been traces of old rat poison. >> some older school structures used during world war ii, and that's when they use thallium based rodenticide. >> investigators followed her leads. the holistic treatment, nothing there. san diego sheriff detective checked out the school. >> i talked to other teachers that worked in the same areas she worked. there had been rumors the previous year there were teachers who went out sick a

lot. i had to look at that, but it turned out to be involved with this. >> a hazmat team searched the house but found no thallium. and, they considered another possibility. >> we had to explore the fact that sometimes in these cases, person may try to poison themselves if they are struggling with depression are crying out for attention. >> brigida had been depressed around the time she first started getting sick. but brigida and everyone who knew her, said there was no way she was suicidal. >> i know my sister more than anybody. she would never do this to herself. >> is the mother of a young child, much less -- >> she always wanted to be a mother and have a family. she would not throw it away like that. >> reporter: -- >> as they eliminated the possibilities, the detective along with dr. lapoint came to a sinister conclusion.

>> i'm proceeding like it's a intentional poisoning. >> why would someone choose thallium? >> it looks like a medical mystery. someone having a slow decline and withering away and dying. you would associate with a chronic illness. >> the next step to solving the mystery was figuring out how brigida had been poisoned. dr. lapoint did his own detective work. >> you see this bright spots everywhere. all throughout. those white flex. >> they are thallium in brigida's digestive tract. when you are seeing this. >> we are like, oh, my gosh. >> if it's in her gut, how does that tell you? >> food. >> somebody is feeding it to her. >> yeah. >> it is what dr. lapoint feared and he took the unusual precaution that left brigida's

family in the dark. >> i cleared everyone out. they were bringing gifts and food. a lot of people get poison to come to the hospital and get wears. if someone is bringing more poison. i want the variables off the table. >> so far, dr. lapoint had done a lot of things right. he knew against thallium, that might not be enough. >> a lot of people do not recover. people can feel their legs again. >> even if brigida survived, there was no telling if life would ever be the same. >> coming up. who could be behind this? >> your circle is narrowing. you're looking at her family, her sister, and her husband. r . how do i clean an aioli stain? thankfully, tide's the answer to almost all of them. why do we even buy napkins? use tide. can cold water clean white socks? it can with tide.

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fnatalie morales: ldr. jeff lapoint, believed someone was determined to commit the perfect murder by feeding bits me dr. lapoint believed someone was determined to commit the perfect murder. by feeding bits of the highly toxic metal thallium to his patient, brigida uto. her tends hours and days, the doctor and his team fought to save brigida's life. she had consumed more than enough thallium to kill her. and yet, -- >> i don't know why i am here. i don't know why i'm still alive . that is scary.

>> meet brigida. she is still with us. did you feel you were dying? >> i did. i did. i was too afraid to admit it to myself. >> what kept you alive in that time? >> my son. wanting to see my son. >> as a antidote took effect, brigida woke up. she found herself in a hospital bed with only wisps of hair on her head. she could not walk or really see. doctors couldn't really tell her what to expect. >> they pretty much were very open about not knowing what was going to happen. >> one day, her cell phone came into focus. days later, she caught sight of something else. >> i was really excited because i could see the tv.

what brand the tv was. across the room. >> small victories. >> at first my goal was to be able to walk with my walker to the door of my room. after that, it was walk to the nurses station and come back. sometimes, they would have to wheel me in. >> while brigida made a slow physical recovery in the hospital, she also had to face the hard truth that someone had plotted against her. >> we asked, is there anyone who has an agenda against you or anything? she vehemently stated no, i don't think there's anyone in my life that would attempt to poison me. >> but the agent knew the intentional poisoning was usually personal. >> statistically and historically speaking, when you have a poisoning, it's either a close family member or close friend.

>> sitting alone in her hospital room, brigida found herself terrified at the thought of doctors lifting the ban on visitors. did you start to become more fearful as you started to then realize that this was intentional poisoning? >> yeah. i started getting fearful. i started thinking about what would happen when i got out of the hospital, if i ever got out of the hospital and who would i have to protect myself from? >> i imagine your circle is narrowing as to who could've done this. you are looking at her family, her sister, and of course, her husband. >> absolutely. >> they talk to everyone including race uto. >> he was a friendly and cooperative individual throughout the investigation. >> was he concerned about his wife? >> when we first talked to him in the hospital, he had some

tears and he kept saying i wish i could do something to help her. >> he said the right things to detectives but the special agent learned something about race uto seemed off. >> some medical staff expressed some concern over his behavior at the time. it came out he was not acting as a concerned husband should be acting. he was asking the wrong kind of questions. he did not seem concerned about what was happening to her. >> suspicious said detectives were, brigida could not go there. are you suspecting your husband had all? >> no. anyone who suggested that idea, why would you think that? that my husband would do something like that? i don't know. he is the one who brought me here. how does that make sense? >> it was true, race took

brigida to the doctors the day she was transferred to the hospital. to brigida that was the act of an innocent man. she remembered how race cared for her as she fell ill. as you were getting more sick, did he show that he was concerned by bringing you food? was that his way of taking care of you? >> that was his way of taking care of me. when i started staying home, he would bring me breakfast sandwiches in bed. he would make sure that i had food. >> and you are thinking, he is taking care of me. >> yeah, he really loves me. he really cares about what happens at this point. >> but, brigida told the detective something else about her husband. it turned out that race had a strange hobby. collecting the types of plant seeds that are used to make poisons. when you hear this, our alarm

bells going off? >> absolutely. that's not a normal amateur hobby to have. that is concerning for us. >> 16 days into brigida's stay in the hospital, detectives had enough evidence to get a search warrant for the home. race was there to greet them. >> he was wearing dark sunglasses. no reason to wear sunglasses especially in such a residents. >> he was seemingly candid. >> we asked, if we a major phone, is there anything in search history that would be a concern to us? he said not at all. by the way, i recently raised the search history and all my electronic devices. >> that made detectives even more suspicious. they took his electronics and scoured the house. the garage. and then, they got to his car. >> the whole for the spare

tire, we find a mix of materials. canister of acetone, packets of exotic seeds. >> still barred from visiting, brigida's family was at home. sister olga called detectives over. earlier that day, her mother had seen race toss out a black trash bag. i was like -- >> i said i'll go get a. >> she went dumpster diving. >> what did you find? >> we found receipts for some exotic seeds he had order. we saw crude filtering mechanisms he had. we found solutions in which to purify and refine some of the poisons. >> special agent gill said they found evidence that race had tried to grind of castor beans to make the poison ricin. they found rosary piece like

these. ac that makes another deadly poison. seeds like these from something called the suicide tree of india. anton race's electronic devices he thought he had wiped clean, they found two books. criminal poisoning and the poisoners handbook. as bad as it looked, there was one thing they did not find. valium. not a trace of it. without that, detectives felt there was not enough evidence to make an arrest. at the end of the search, race uto remained a free man. but the detective knew he needed to warn brigida. >> i went to the hospital and we had a long talk. i showed her some of the stuff we found and laid it out for her. if you get out, you need to not go back to your husband. >> coming up. a pivotal polygraph begins.

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the poisoning of his wife brigida. a search of his car and a discarded trash returned materials to make highly toxic substances. investigators still could not tie race to the thallium that nearly killed his wife but a stunning twist. not one but two jaw-dropping discoveries that would blow the case wide open. here is natalie with the conclusion of the prussian blue mystery. >> by now, doctors and nurses and law enforcement of believed they had to protect brigida from her husband. even if brigida still could not wrap her mind around it. >> i finally had gone to the point where i told investigators, i will continue the investigation, but i need proof. >> so did law enforcement. they kept digging and learn race uto had a secret life. there was a girlfriend who thought his wife was dead. >> he had taken his son with

them on some other dates. the sun was actually calling her mom. uto painted this picture like he was a former navy seal. he specifically mentioned he wanted to work for the fbi in the poisons department. >> kind of like what you do. >> that is ironic. >> they found another girlfriend. >> he specifically told that girlfriend he wanted his wife to get hit by a bus and for her to die so he could get sole custody. >> investigators decided it was time to confront race. they asked him to take a polygraph. >> he is a person who seems to have gone through life by talking himself out of situations. >> it started easy, almost a casual chat. >> i spent time with him. when i could, serve. >> then he got more serious.

the sensors were strapped down. >> let's get started. >> his demeanor during the first half was confident. i think he thought he had a beat. >> paul was a prosecutor on the case. >> it almost looked like, i got this. i am getting through this. we are good. >> are the lights on in this room? >> yes. >> regarding poisoning your life -- were you involved in poisoning your wife? >> no. >> did you poison your wife? >> no. >> nine times the investigator asked the same questions. every time, race uto assured him he did not poison his wife. he seemed sure he passed. >> testing went on. the polygrapher eventually stopped and let them take back

confronted him. said, i don't believe anything you are saying. >> you failed your test. you failed it miserably. >> that is when he confessed. >> race broke. the details of how we tried to kill his wife began tumbling out. >> i can't remember. >> race said the first time -- he fed thallium to brigida, it was in a sandwich. >> it was egg and cheese. >> the second time walk me through what you did? >> i threw it in with food. >> race told law enforcement he doled out the poison based on brigida's weight, starting with one gram of thallium in late summer 2017. >> he thought based off your weight that it would kill her the first two times? >> brigida got sick but she did

not die. so, he upped it the last time up to five grams. he thought that was going to do it. >> it should have been a lethal dose, but he didn't factor in his wife's will to live. all the doctors, nurses, detectives say it is your quiet strength that allowed you to pull through. do you believe that too? >> yeah. i struggle with that. >> don't be humble. >> thank you. i would hope so. i would hope i have that to give to my son. i think it is the work they did together that has helped me be here now. >> police arrested race immediately after his confession. eight months later, race uto pleaded guilty to three counts

of attempted murder. he is serving 21 years to life. >> my parents saw him as their son at one point. i saw him as a brother and he took advantage of us wanting to be open and caring with him. >> i couldn't believe it for a while. how can this be? he was doing this to our daughter. i thank god they are right next door. i think if they had been living someplace else, she would've died. >> you go back in your head every playing the times he brought you food, meet you food, was there an instance that stands out? >> he had made a breakfast sandwich. he taken it to the bedroom for me. my son climbed up and wanted a piece. immediately, his reaction is no, do not give him any of it.

i think about that all the time. >> a moment that could've easily gone a different way. it haunts her. emotionally, how are you doing? >> it is rough. it is hard to stop and think of what happened. the amount of deception. i cannot really trust people, and trusting myself is difficult too. >> before they were married, brigida told race that is a catholic, she believed marriage was forever. how do you feel about divorce now? >> yeah. i love the idea. >> this strong woman who once could not walk is now running again. >> it has been hard when, at first i could not even walk without a walker. it has been a slow, slow

progress. >> is this your therapy? >> yeah. i remember being in the hospital and finding everything out and being so angry that i could not get up to go for a run. >> right now, brigida's focus is on embracing life and all its thrills. >> i have gone skydiving. i mean, i have done different things. >> you are living life to the fullest now. >> absolutely. >> that is all for this edition of dateline. i am andrea canning. thank you for watching. watchin this sunday, campus clashes. president biden calls for calm as protests over the war in gaza overwhelm college campuses