And they were about to get some help from their mother herself. There it was. Evidence she left for you to find . Yes a possible clue. Hidden, in an envelope marked baby pictures. But tucked inside . A journal that painted a different picture, entirely. We pulled out the envelope and that was like, wow. Could their mom help them solve her own mystery . We cant quit. We are her voice. We made a promise. We made a promise to our mom. Im lester holt. And this is dateline. Tonight, Keith Morrison with the promise. Reporter here they were again. Two sisters on a holiday in paradise. Or so the other vacationers must have assumed here in americas midpacific garden. In the lush resort near honolulu. This journey has more to do with a personal hell than any paradise. That and a long ago promise to their mother. Could you have believed that you would be sitting here in this hotel room, talking about this subject, in the year 2014 . No. Its pretty crazy. I could have never seen this coming. Reporter perhaps it is, pretty crazy. But there is apparently no stopping them, these tenacious sisters, tammy cocard and tiffany young. There is no halfway when it comes to to a promise. Its either all or nothing. Reporter bizarre story . Oh yes, it is. At the center of it is a woman named shirlene van gndy. A beauty queen once, back in colorado. A girl who loved to dance and she was popular and unpredictable and kind of exciting. Long before she became the effervescent mother of tammy and tiffany. My mother was an incredibly beautiful soul. She taught both my sister and i that there was nothing that we we couldnt do. Hi. I love you. My earliest memories of her are her singing to me. She loved to sing. And she played with me. She was she was a big kid. What was that like for you . Oh, like i was the only child in the world. Like i was her full focus and attention. My mother was a free spirit in many ways and didnt have a lot of rules. I didnt have to do things like normal kids had to do. Like brush my teeth all the time. But i liked it that way. Reporter and so it was often tammie, and not her mother, who took on the responsible role with little sister tiffany, ic shirlenes manic exuberance. She was unstable. And she had a hard time taking care of herself, much less anyone else. Uhhuh. Unstable. She would have the highs of highs and the lows of lows. Reporter moods. Very dark ones sometimes, said the girls. She didnt want to really admit that there was an issue. It was a hot button, and it wasnt something that you wanted to bring up unless you were ready for the fight. Reporter when shirlene left the girls father, tammie refused to go with her. I said, im not going. I cant leave. I cant leave my dad. What did that feel like . Like my heart was being ripped in two. Reporter the girls lived apart for years after that, until their father won custody of tiffany, too. And then the girls watched, loved, and worried about their moth and then, late 80s, shirlene finally found real happiness when she met and married a man named ken wakisaka. She goes, ive never been with a man who really got me. He gets me. She, in her whole life, i think had never felt so quite thoroughly and utterly embraced by someone who loved her just the way she was. Reporter and just because shirlene had dreamed of living in hawaii, ken got a job here and moved her to this condominium complex by a golf course on the pacific. He was a very likable guy. Very very much a gentleman, always opened the door for you. Reporter the sisters grew up, made lives of their own. Tiffany and her boyfriend, now husband, moved to arizona. Tammie settled in Northern California with a husband and two small children. And for a whole decade shirlene seemed so happy with ken. When did it change . It seemed to start to change around 1998. Reporter shirlene told the girlth fighting. Mid1999, she called them, very upset, and when they went to hawaii to see what was wrong, she said the strangest thing. Asked them to promise her something. She said, promise me. If anything ever happens to me, youll investigate. And we said, mom, what are you talking about, if anything happens to you . Just promise me, she said. Reporter shirlene left ken soon after that. Moved to the mainland. The girls thought the break was permanent. Were relieved actually. But seven months later she said, im back in hawaii and im back living with ken and everythings fine. I dont want you to worry. Reporter but worry they did. She would call me and we would talk about things. And then she would call me again an hour later and she wouldnt remember anything that we talked about. Reporter it got so that tammie sometimes didnt pick up when her mother called. But of course she had no idea what was about to happen, least mom had started calling my house, and i was letting it go to the voicemail. And all the messages were pretty much the same, that she loved me, she found god, everything was fine. Reporter tammie waited until morning to call back. It was april, 5. And ken answered the phone. And he said, i dont know whats wrong with your mother. Here, you talk to her. I said, hi mom, its tammie. I said are you okay . And she said. I love you. Her words were very drawn out and slurred, like id never heard before. What was that like, that conversation, for you at your end . Oh, i was in a panic. Reporter in a panic, tammie called tiffany to clue her in. Still frantic, tammie then called the Honolulu Police department, it was 6am there. She got an ambulance dispatched to the condo. My sister is the hero. Shes saving my mothers life and its the ambulance. Like, theyre gonna theyre the professionals that are going to sure. Theyll fix it. Theyre gonna fix it. Reporter but the paramedics didnt notice much to fix. Their report states patient was conscious but under emotional distress. She appeared calm but would not acknowledge our presence. Her spouse informed us she may have taken some aleve aspirin with two beers. The report continues. There were no empty containers of beer and no odor of alcohol on the patient. We were also informed by spouse that patient had said she was dying. Very unusual indeed. But the emts did not take shirlene to the hospital. Left her at home with ken, instead. How is it possible . How is it possible . This was horrible. It was horrible being so helpless. Reporter tiffany was so far away, on the mainland, in a panic, trying to reach her mother. Calling repeatedly. Ken finally answered the phone. You can talk to her. And she said, i love you. And and it was so hard for her to say it because the mere effort of moving her lips took so much. Reporter eight long hours passed, and then, at 2 pm, ken called 911. They rushed her to the emergency room, did what they could. Nothing worked. Ken called tammie from the hospital. Tammie broke the news to tiffany. It went from, you know, just being in this place of such utter desperation and helplessness and despair and and uncertainty, like, and knowing in my heart that she was she was gone. Reporter though still barely hanging on, on life support. And thats when it began with that first rush to their respective airports for flights to honolulu. No idea how long that journey would be. How hard that promise to keep. What had happened to their mom . When we come back. The sisters start their own investigation. Most people would just leave it to a Police Department to do the investigating. Not you two . No. And theyd find a possible clue from their mother herself. She said if anything ever is to happen to me, i want you to ask for your baby pictures. Remember that, remember that. Marks or yellow stains on your clothes . Use new degree ultraclear black white. No white marks on black clothes. And no yellow stains on white. So your white clothes stay white. 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Throw it all in. Cascade platinum powers through. Your toughest stuckon food. Nice. Cascade. Re not all the same. Turns out, theyre really. Different. Who knew . I had no idea. So, she said look for. One thats shaped like a dental tool with a round. Brush head. Go pro with oralb. Oralbs rounded brush head surrounds each tooth to. Gently remove more plaque and. Oralb crossaction is clinically proven to. Remove more plaque than sonicare diamondclean. My mouth feels so clean. Ill only use an oralb the 1 brand used by dentists worldwide. Oralb. Brush like a pro. Hours. On the long plane ride to hawaii, all sisters tammie and tiffany knew was that their mom was on life support. They werent sure why or even what exactly happened to her but during those six hours they had plenty of time to reflect on what she said to them nine months earlier. Promise me youll investigate. If anything happens to me, youll find out what happened. Reporter theyd promised, of course. Though even before they even got on the plane for hawaii, they called the police to report that they already had their suspicions. And those suspicions were all about shirlenes husband, ken wakisaka. I heard from tiffany before i even went to st. Francis west. I was assigned the case by my lieutenant, and he said, before you go, call this girl. Reporter tiffany told detective nick cambra about her preflight conversation with the hospital. Attendant ill never forget this. I said, wheres ken . And he said, he went home to feed the dogs. I said, so shes there by herself . Well, who does that . Reporter by the time detective cambra got to the hospital he had been told what tammie and tiffany had suspect, that shirlene had taken or been given an overdose of pills. He also heard from medical personnel they thought kens behavior seemed strange. Though no one, including the ambulance driver, could quite say why. He also related that the husband was acting suspicious. Reporter did he say how . He said he just the way he spoke and the way he acted. Reporter suspicious . Yes. Reporter when detective cambra heard that ken left the hospital while his wife was lying in a coma in the icu, he wondered, was ken going home to cover up a crime scene . And when cambra checked to see if ken had a record of any kind, he discovered, yes, he did. I did pull Police Reports of ken. Ken had been arrested for abuse. Reporter it gave cambra pause and made him consider what hed already heard from tiffany. That her mom had said she would never commit suicide and that she was afraid that ken was trying to kill her prior to this incident. Reporter now, in hawaii, at their mothers bed in the icu, tammie and tiffany vowed to find out what exactly happened to their mother. You know, most people would just leave it to a Police Department to do the investigating. Not you two . No. Reporter first target . Ken and shirlenes condo. Must be evidence there, they decided. So they made up a story for ken, told him they needed a rest after their long flight. Could they borrow a bed in the condo . And, sure enough, he gave them the keys, while he stayed at shirlenes bedside in the when he was there, what did you guys do . We went to the house. In ko olina. Reporter to do what . To see what we could find. Reporter just kind of look in cupboards, and under beds and in closets for what kind of stuff . For things that we thought that might help us to figure out what happened that day. Reporter because shirlene sounded so out of it on the phone, and ken mentioned pills to the emts, tammie wondered if her mother took pills. In fact, the hospital was treating it as an overdose. But the sisters did not believe she did it deliberately, so they went looking for those pill bottles. And we had looked through the house and couldnt find them. And so we were out in the backyard, just looking. And sure enough reporter in the backyard . Underneath a bush. Reporter as if theyd been hidden there or what . Yes. Reporter in their minds, only one person could have hidden them, ken. Were about to drive away from the condo, having thrown in the back seat a sealed envelope ken had left out for them. Suddenly tiffany remembered Something Else her mom told her. She says, tiff, i have to tell you something, and its important. And she said, if anything ever is to happen to me, i want you to ask ken for your baby pictures. Remember that, okay . Remember that. Reporter and, sure enough, that appeared to be what ken had just given them. They tore open the envelope and inside . Most definitely not baby pictures. Coming up there it was, evidence she left for you to find . Yes. What could be a revealing clue from their mom and a revealing chat with ken. What did he say reporter sisters tiffany and tammie read, transfixed, the contents of an envelope prepared by their mother, for them, and clearly marked baby pictures. But that is not what was in the envelope. Instead they found notes, written by ken, apparently an assignment for an anger management class. It was actually a journal about all the different ways that hed abused her. I have spit at shirlene. I have yelled at shirlene. I have pushed shirlene. Reporter there it was in his own hand, evidence she left for you to find . Yes. Reporter and suddenly the sisters truly believed their mom was sending secret clues that almost screamed open in case of death. Attempting to solve the mystery, they found a willing ally in detective cambra. One plan they came up with together . Secretly recording a phone call with ken. Tammie made the call from the Police Department. The strategy was for tammie to act friendly, supportive. Hello. Ken . Yeah. Hey, its tammie. Reporter ken told tammie he was deeply concerned for shirlene. I love her. Its not the same without her here. I miss her very much. Reporter but ken also said he was suspicious of tammie and her sister. The feeling im getting is like fe and it sounds like youre going to maybe sue me for manslaughter or something, or murder. Reporter still, he spoke with tammie at length about the day. He said shirlene told him she took pills and seemed suicidal. She said she wanted to die . Yeah. She did Say Something like, its not working. Its not working. Its not working . Yeah, like for her to die. Shes saying, its not working. Reporter and then, after a pause, he volunteered something that shocked them all. I guess i dont want to say it. But she did say, choke me so i could die. She said that . Yeah. She said please choke me. Oh, ken, didnt you think at that point you should call the ambulance . No, because i thought she was just being disillusional. I was really scared. Reporter but he then returned to the Strange Point he made before. I havent choked her. Theres nou marks around her neck. Right. You can have the doctors check that out. Reporter what a strange thing for him to say. He said a lot of strange things. Reporter now, the girls felt they had to move very fast, while shirlene was on life support. As long as she was alive, they decided, they had the legal right to rummage through a garage in a house in california shirlene had kept looking for evidence to use against ken. So they flew to the mainland. And thats where they were when ken gave consent to take shirlene off life support and she died. And i remember thinking and just bawling my head off again. So i was mortified. And i was devastated again that i wasnt there. Reporter at shirlenes funeral, according to detective nick cambra, kens eulogy sounded like a wellprepared criminal defense. He started with that shirlene initiated sex the night before, that she was happy that they were together. And then he started he went on to the next day and how he reporter shirlenes daughters were horrified. Now, they were fully determined. To keep their promise to their mother, theyd need to ensure that ken was charged with her murder. Next to look at the case, prosecutor dan oyasato, who found kens remarks about strangulation very disturbing. And heres why. This was viewed as an overdose. Thats how this case went to the hospital. Thats what tiffany and tammie were thinking. Thats what the Police Department was thinking. Reporter and yet, as oyasato began to dig deeper, he found that ken talked about strangulation more than once. He brought it up with the medical examiners investigator and was basically telling them, this is not a strangulation case. Reporter in fact, said the prosecutor, ken tried to persuade the examiner not to do an autopsy. But, of course, there was one. Enough, cause of death, said the medical examiner, brain damage due to ligature strangulation. When an arrest warrant was issued, detective cambra served it personally. Police arrested 45yearold Kenneth Wakisaka tonight. Prosecutors say he strangled his 52yearold wife last april. Tonight, Police Charged him with murder in the second degree. Reporter howd he react . He said, nick, you know i didnt kill my wife. I didnt kill my wife. Reporter in 2002, two years after their mothers death, tammie and tiffany came back to hawaii. This time to the courthouse where ken wakisaka went on trial for murder. He took the life of another human being, and that human being was our mother. This was a murder by strangulation. It was Domestic Violence at its ultimate. Reporter in his opening statement, prosecutor dan oyasato quoted from kens own statements to accuse him of murder. Can you tell if a person has been strangled during autopsy . Defendant to an investigator from the medical examiners office. Reporter in court the medical examiner repeated her opinion that shirlene was strangled, said she found ligature marks on her neck. And in court the prosecutor played a tape of that recorded phone call with tammie, in which, sure enough, ken brought up the idea himself. I guess i dont want to say it. But she did say, choke me so i could die. I really believe this was kens subconscious talking out. No one, not a soul, was thinking this was a strangulation case. Reporter until he opened his mouth and until he brings this up. Reporter that made everybody suspicious. Every witness who testified as to having some contact with ken spoke about his unusual behavior. His focus was not on his wife. It was on other things. Reporter but theres always a but. Kens defense attorney, mal gillin, accused police and prosecutors of jumping to the wrong conclusions and rushing to judgment against ken. That ligature mark . Must have been made by the tube that lay on her neck while she was on life support. This wasnt a strangulation, he argued, wasnt a murder at all. As ken had said all along, shirlene took an overdose. Mrs. Wakisaka, because of her various mental disorders or defects, committed suicide. Reporter the trial lasted two weeks. The jury heard detectives, doctors, shirlenes daughters, of course. Ken himself chose not to take the stand. Howd it seem to be going . It seemed to be going well. Reporter as if, here, their promise would be kept. But life, as everybody knows, is full of surprises. Coming up, the verdict would be swift, but the real stunner was what came after. Nobody stood up and said, i object. It is amazing. It haunts me. I tell you right now, it haunts me. Whats it like to not feel 100 fresh . We dont know. We swish listerine®. As do listerine® users. The very people we studied in the study of bold. People who are statistically more likely to stand up to a bully. Do a yoga handstand. And be in a magicians act. Listerine® kills 99 of bad breath germs so you can feel 100 in life. Bring out the bold™. Im about to pop a cap of mmm fresh in that washer wny. 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Yes. Reporter tell me about that. What a huge relief to hear those words, we, the jury, find ken wakisaka guilty of murder in the second degree. It was amazing. Ken was well, surprised would be an understatement. I didnt expect this at all. Reporter but these two . I was a really happy girl. You know, im like the system worked. You know, it worked. Reporter ken, who still maintained his innocence, was sentenced to life in prison. And that would be it, end of story. If he doesnt tell us, would be the basis for edmunds appeal. The most serious offense is commenting on the failure to take the witness stand. But were supposed to be professionals, and were not mistakes. Reporter did you write your Closing Argument . I write an outline. I commit it to memory. Reporter so, how did that line come out . Prosecutor oyasato said it was a mere slip of the tongue. What i was trying to do with that statement was actually transition from, if he doesnt know, then we need to look at her body. We need to look at the rest of the evidence to tell us the story. Reporter none of this seemed like such a big deal to shirlenes daughters. People file appeals all the time. I understood that. But i wasnt paying attention anymore because it was done. Reporter oh, but it wasnt done. In 2003, a year after the trial and three years since shirlenes death, hawaiis Supreme Court handed down its decision. I got the call from dan oyasato, the prosecutor. And he said, the verdicts been overturned. Reporter overturned. The guilty verdict the daughters so desperately wanted, pulled out from under them just like that. He goes, it wasnt the evidence of the case. It was on the 5th amendment. It was prosecutorial misconduct. Thats my fault. Reporter so he took responsibility for it right away . Instantly, instantly. The pain that he felt, because he worked so hard. It haunts me. Ill tell you right now, it haunts me, you know, that i did this. I have apologized i dont know how many times to the girls because of my error. Reporter still, said the sisters, the ruling didnt mean ken was innocent. Far from it. Even though the verdict was overturned, it was overturned on technicalities and not on any evidentiary issues. Reporter and they found a small silver lining. The Supreme Court said ken could be retried. And so that left the door open for us to bring it back to trial. And we just needed to try again. Reporter so they took it upon themselves to pick up right where they left off. After all, a promise is a promise. I just remember thinking, okay, so we need to keep pushing. You cant quit because there is no other option. Because you can make a difference. Reporter ken got out on bail, but was still under indictment for murder, and they all waited for the new trial. And then, once again, john edmunds put on his reading glasses. And what i found again stunned me. Coming up i went over to talk to the emt. A possible new witness with a very different story to tell. I couldnt believe it. I still dont believe it. When dateline continues. Tissue test hold this up to your teeth. Ugh yellow. I dont get it. I use whitening toothpaste. What do you use . Crest whitestrips you should try them whitening toothpaste only works on the surface. But crest whitestrips safely work below the enamel surface. To whiten 25x better than a leading whitening toothpaste i passed the tissue test. Oh yeah. Would you pass the tissue test . See for yourself with crest whitestrips. They are the way to whiten. Cough doesnt sound so good. Take mucinex dm. Ill text you in 4 hours when your cough returns. One pill lasts 12 hours, so. Looks like im good all night some cough medicines only last 4 hours. But just one mucinex lasts 12 hours. Lets end this. Baa baa black sheep, have you any wool . No sir, no sir, some nincompoop stole all my wool sweaters, smart tv and gaming system. 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If a grand jury asks to hear from a witness, the prosecution must comply. Didnt in this case. It wasnt a minor witness, either, said edmunds, but great deal about what really happened to shirlene. The wakisakas had an upstairs room that they rented out to a guy, and he had been there and seen a lot of what went on that morning. Reporter though the grand jury didnt hear from the roommate, detective nick cambra did. Cambra asked him, what did shirlene say to ken on the day she died . The defense provided us an excerpt of detective cambras interview with the witness. She was asking ken to come here, you know, be by my side. She did say she wanted to die in peace. Reporter testimony that seemed very much in kens favor, testimony the grand jury that indicted him never heard. Defense attorney edmunds again went to court, and again won. So tell me, from a practical point of view, what did those victories mean for ken . Well, from a practical point of view, it meant that indictment got dismissed. Reporter dismissed. As if n ken was no longer free on bail. He was simply free. And now were back to a point as though the case never was brought in the first place. And thats frustrating. How do you get your head around it . How do you process all of it . How do you move forward every day . Reporter and how would they make the case against ken and persuade the state to start from scratch . Kens story had never changed, that shirlene killed herself, accidentally or on purpose, with an overdose of pills. Of course, the state still had evidence, like that pill bottle the sisters said they found stashed in the back yard of the condo, as if ken fed the pills to shirlene, then tried to hide the bottle from the police. But defense attorney edmunds could show ken didnt try to hide anything, that, in fact, he took paramedics to the medicine cabinet himself. They counted down tablets in a bottle of pills to see how many were left, and how many tried to figure out how many shed taken. Done. Reporter and there was a potential new defense witness who knew shirlene well, didnt like her at all, in fact. And she has her own strange theory on what happened to shirlene. You get to know the people who are living in your you have to. Reporter building, yeah. Marjorie collier managed the condominium complex where shirlene and ken lived. Unlike the daughters, marjorie considered shirlene the dominant, even abusive, force in the marriage. She used to tell me that ken was the complete opposite of her, that he was very quiet, and he would never argue with her or get into a fight with her. Hed leave the building. Reporter yeah. Hed just go for a walk. Reporter howd she feel about that . She didnt like it. Reporter marjorie was on the scene april 5th, 2000, after tammie called 911, urging emts to check on her mother. I went over to talk to the emt. And he said, well, shes awake, and shes coherent enough to tell us that shes not coming with us. Reporter remember, in the official emt report, it was ken who said shirlene didnt need to go to the hospital. But marjorie insisted an emt told her it was shirlene who refused to go. So, your memory of thats pretty clear . Im positive. Reporter when you heard that ken was accused of strangling her i was absolutely shocked. I couldnt believe it. I still dont believe it. Reporter but, what does she believe about how shirlene died . Well, just her speculation, of course. Its based on an incident that began, she said, when shirlene was making a fuss in the condo office. And she was being very pushy. And i went to shut the door, just to get her to go home, because i wasnt even open yet, and the door hit her arm. And she spilled her cup of coffee. Reporter the next thing marjorie knew a Police Officer was threatening to arrest her. And i said, for what . And he says, for abuse. And i looked at shirlene. And from her thigh, midthigh, all the way down to her feet, was burned, severely. Reporter youre kidding. Burned, more burned than you get laying out in the sun all day. Reporter was it from that coffee . Thats what she said it was. But the Police Officer told me one cup of coffee wont burn both those legs like that. Reporter both legs were burned . Yeah, she burned her own legs. In that case, marjorie believed, shirlene was willing to hurt herself just to frame marjorie. So, when shirlene died . What i thought, honestly, was that it was another ploy, and she had tried to make it look as if he was trying to kill her, and she went too far and accidentally killed herself. I think that thats marjories perspective. Do i think that shes correct in her opinions . No, absolutely not. Reporter to shirlenes daughters, there was still no doubt about what really happened and what to do about it. I think your mother had a word, didnt she, that she liked. What was that word . Tenacity. I just had to keep going. And heres the thing about keeping going, by doing something, in the process, i was honoring her. Reporter tiffany filled a suitcase with documents that some prosecutor might find useful, hauled it back and forth to prosecution meetings, pushing for action for years. Well, i kept going to hawaii for sure. Im, like, pardon, hi. Its me again. My mom whats going on with my moms case . Reporter by this time, dan oyasato no longer worked at the Honolulu County Prosecutors Office. And the prosecutor who took over the case seemed reluctant to go forward. But that wasnt going to stop shirlenes daughters, not for one minute. We had a guilty verdict. We need to move forward. We nee r we need to go back to trial. Reporter but, it turned out, a big surprise was coming, this time, from the prosecution. Coming up a whole new theory of the case a change for prosecutors a challenge for that promise. How long are you prepared to keep going . As long as it takes. I made a promise. Reporter april 2014, tiffany and tammie returned to hawaii where they marked a painful anniversary, 14 years since their mother, shirlene, died. Its heartbreaking. Reporter why do you say heartbreaking . Weve spent all these years trying to get justice. We made the promise to my mother that we would investigate, therefore it has to be, therefore you cant quit. Reporter the daughters thought theyd made good on their promise to find justice for their mother if anything happened to her when shirlenes husband was convicted in 2002 of murder by strangulation. But that verdict was overturned in 2003. Then, kens original indictment was thrown out two years later. You thought maybe a few months itd be back in court . Not a few months. I thought within a few years. Reporter but the years just kept passing. Ken has moved on, though he still lives in the same condo. He is happily married. He is employed, works for a Construction Company as a Quality Control manager. Reporter but tammie and tiffany say they cant move on, and they acknowledge its been hard on their husbands and children. I feel really bad for my family because its not their mother. They didnt make the promise i did. Because every time im not there someone else has to cover all the things that i normally do. Reporter tiffany, especially, makes the trip to hawaii repeatedly, and kids and husband know theyre on their own whenever she rolls out the suitcase stuffed with case papers. Yeah, thats the signal. There simply is no other room in those moments for much of anything else. Reporter still, they push on. We will get a conviction. And i will do everything i can possibly do in order to make that happen. Detective, nick cambra, too. Hes retired now, but he counts the years and wonders. Do you perceive enthusiasm in the Prosecutors Office to not at all. Reporter to go after this . Not at all. Reporter they would do so reluctantly . Yes. Reporter but why . If prosecutors won a conviction once, why not just do it again . At this point its not my decision. But what i can say is, provided the evidence was not suppressed and is still available, there is more than ample evidence to prove his guilt. Reporter anticipating a new trial, defense attorney edmunds hired renowned forensic pathologist, michael baden. And asked him, what is your opinion . Was there strangulation or not . He said absolutely not. He said, this is just wrong. Reporter so the new prosecution hired its own experts, and, well, it didnt go as planned. The new prosecutor on the case said that they had one or two Forensic Pathologists who agreed with dr. Baden. Reporter they agreed that but these are prosecution experts. Did that surprise you . It did. Reporter yeah. I dont think that they provided all the information that the expert needed in order to make that determination. Reporter the prosecution announced in court in 2010 it was abandoning the strangulation theory, the very theory that got ken convicted in the first place. What did you think when they just dropped that theory . I was shocked. Honestly, i was shocked. Reporter the current prosecutor declined to talk with us, or share any information about the case. But in an email to the daughters, from january of 2014, he said his boss, the chief prosecuting attorney referred to here by his initials kmk, gave the green light to go forward. Go forward with what . A whole new theory called murder by omission. Whats your understanding of what murder by omission is . My understanding is that its a duty of a spouse or a parent to get medical help for someone who cant get help for themselves. And if they die because of that, then youve effectively committed murder. Reporter in the email, the prosecutor told the girls, he just needed one or more experts to give the opinion that wakisakas failure to perform his duty to provide timely medical care for shirlene caused her death. Despite abandoning the strangulation theory, the prosecutor, in his email, now said he might actually bring it back, along with murder by omission, for a possible new trial. Do you really think they will . Have they . Reporter have they . No, they have not. Theyve done nothing. Reporter so, what stage are you at . Believe it when you see it . Something. Quit leading us on to believe that youre going to move forward with a case that weve been hanging onto for ten years. Reporter defense attorney edmunds said he would knock down the prosecutions new omission theory by pointing out that ken did try to get help for shirlene by calling 911. So far, there has been no move to charge ken, and its not clear when, or if, there will be. I dont think you could fault these two women for how they feel about the loss of their mother. Reporter they had been tenacious. Tenacious. Reporter youd agree with that . Yes. Doesnt mean theyre right. Reporter ken has maintained his innocence all these years, even though shir leaps daughters quest to prove him guilty goes on. Hes very troubled by it. Reporter is he living under a cloud now . He feels he is. Hell never really be at peace. Now, more people recognize him on the street. Thats embarrassing. I miss her so much, tammie. Me, too. Reporter call it a promise, a quest, an obsession. Her daughters journey isnt over. How long are you prepared to keep going with this . As long as it takes. Reporter i mean, you could be sitting here an old lady and, years and years from now, and nothing will have happened. We made a promise. We made a promise to our mom. It is with such purpose and such passion and such love that i do this. It is in honor of my mother. I dont care if its labeled obsession or crazy. Im doing this because i love her. And she deserves it. Reporter thats all for now, im lester holt. Thanks for joining us. This sunday, a divided country on a split screen weekend. It began with the inauguration of a new president. Yes, together, we will make America Great again. That brought out hope in some. Its amazing to see our democratic process. And prompted millions of women to march across the country. We are america, and we are here to stay. And around the world. To march for womens rights and against the new president. Plus the bizarre fight over crowd size. It looked like a million or a million and a half media of lying about the size of the crowd. But the photos comparing fridays crowd with obamas first inaugural tell a very different story. And that inaugural address that was a call for renewed american strength, and a dark portrait of the nation that President Trump now leads. This american carnage stops right here and stops right now. My guests this morning, kellyanne conway, Chuck Schumer of new york. Joining me is chris matthews, kristen welker. Hugh hewitt, and elliana johnson. Welcome to a special meet the press. Good sunday morning on this most remarkable of inauguration weekends. Hundreds of thousands of people gathered on the Washington Mall to celebrate. The big stories turn out to be the massive demonstrations and then the head scratching decision by President Trump to pick another fight with the press. Two million people, mostly women, took to the streets to fight for womens rights and to rebuke President Trump. Some had to cancel marches. The crowds rattled the white house. Sean spicer gathered reporters, took no questions, and then flatly accused the media