shotgun. said good-bye to the ivy league, and on a winter's day, drove home. >> that's all for this edition of "dateline." i'm craig melvin. thanks for watching. >> i'm craig melvin. >> i'm natalie morales. >> this is "dateline." she told archie she was dating this man. if he didn't like it, he could leave. >> he had been stabbedultipl times. nobody s anying. >> i went, dad. and i touched him. i will never forget that feeling. >> it was just before dawn when he found his father dead in the driveway. >> there was no doubt in my mind what happened. i immediately knew. >> there was someone else who may have known, too. >> i turned around and looked at my mom.

i go, you know who did this. that son of a -- >> there was one thing no one could know. the strange twist still to come. >> it was a bit of a surprise. kind of a shock when you found out she was seeing him again. >> yes. >> a lover's triangle always leads to trouble. >> how could you do such a horrible thing? >> did this one lead to murder? >> what was it like watching him walk out of jail? >> he beat the system. >> hello and welcome to "dateline." how long does it take a killer to stop worrying about whether he'll ever be caught? a couple weeks, a couple months? 25 years? if he still is a free man then, he probably would be pretty sure he did, indeed, get away with murder. after all, detectives retire,

witnesses forget. a trail goes cold never to warm up again. until one day it does. here is keith morrison. >> reporter: what a time it was. the year he turned up in that crazy little car. what a sweet, impossible, unexpected last chance. that love, that red passionate sin. just for mary ann. it was 1985. and it was magic. and now here she was, 2011, in a courtroom of all places. forced to confess her forbidden love, account for her sins.

this grandmother, widow, penitent. what story would she tell? >> the main thing going through my mind is to tell the truth. and let the chips fall where they may. >> reporter: the truth. such a difficult word. especially when it bubbles up from a past which mary ann mcfarland must have believed was buried forever. >> where was your husband? >> he was still in the house. >> reporter: men. trouble was, there were two, which was the one central fact. the inconvenient truth that caused all the trouble. and might have been forgotten had it not been for this inquisitive d.a. and this long, lean cop, jim wallace, looking on so intently. >> this is a case, a true love story, between three people.

one woman who was loved intensely over the top by two men in two very different ways. >> he was the first, the husband. handsome, athletic, adventurous, a surfer, the real deal. his name was archie mcfarland. everybody loved him. laid back, kind, reliable. ten years older than mary ann but crazy about her. she brought a daughter with her when they married in the early '60s. together, they had a son, gary. they settled down near the ocean, an l.a. suburb. >> we had a great typical nuclear family. dad went off to work. my mom stayed at home. and did the all the home stuff, the stuff that you see in leave it to beaver. >> reporter: you will see when gary talks about his dad how close they were. and it wasn't just because archie introduced him to surfing. >> i always looked up to my dad.

my dad was a really soft spoken, easy going yet affable guy. >> reporter: here they were to the outside world an old-fashion family. inside, secretly, something seething. it was almost christmas 1985. 5:30 a.m. archie started work early. so did gary, who was just 20 years old then. >> he had come into my room and he said, gary, i'm going to be leaving now. so make sure you get up. i said, okay, no problem. thanks, dad, love you. see you. >> reporter: gary showered, dressed, headed outside into a cold, dark morning. it was then he saw something odd lying on the pavement. >> as i got closer and closer, i started saying that looks like my dad. and when i finally got up and then rlized itas my dad, i had that moment of just --

like disbelief. >> reporter: archie, was healthy, just 58, didn't make sense seeing him like this on the driveway. >> i went, dad? and i touched him. and there was just -- i will never forget that feeling. but it just -- it was very lifeless. it didn't -- it didn't feel good. so i started yelling, mom, mom, call 911. dad is laying on the driveway. i don't know what's the matter. >> reporter: when paramedics arrived it was too late to save archie or in this next moment, the innocent expectations about life which gary now lost for good. >> there was just blood everywhere on the front of him. i just lost it at that point. >> reporter: torrence police

detective gill kronk ki arrived. >> he had been stabbed multiple times. two were upper torso as if the assailant was confronting him. >> reporter: couldn't have been a robbery. not a thing was taken. archie's car still there. >> nobody saw anything. >> reporter: but to the detective, it was clear enough. archie mcfarland had been targeted and executed. and whoever killed him had escaped without leaving behind a murder weapon or fingerprints or even a hair in what must have been a violent struggle. anyway, this was pre-dna. >> they just didn't have any physical piece of anything left on the driveway. that was the big focus. >> reporter: but there was a clue. oh, yes. and it was, frankly, very, very strange. >> one of the stab wounds was in the groin area. >> reporter: what did that tell you? >> it's personal. >> reporter: kind of like somebody sending a message? >> yes. >> reporter: maybe a sexual message? >> yes.

>> reporter: about then on that crisp december morning as gary and his mother stood shivering and sobbing, the realization suddenly hit. >> i turned around and looked at my mom. i go, you know who did this. that son of a [ bleep ]. i just -- i immediately knew. i just -- it was like, there's no doubt in my mind what happened. coming up -- there was someone else who also seemed to know who the killer was. >> how could you do this? do you know what you've done? you've destroyed me. >> when "dateline" continues. the moment you realize you're ready to make dinner

but your oven isn't. at lowe's, we have more appliances to choose from. so, you can get the right one, at the right price, right now. get up to 35% off select appliance special values at lowe's.

december 1985, christmastime, but not for archie mcfarland whose remains were now a crime scene in the predawn dark of his own driveway. even before police arrived to begin their search for the usual clues, even as gary mcfarland cradled his father's lifeless body in his arms as his mother mary ann rusheds to his side, they knew, both of them, without a shadow of a doubt, who did it. >> she immediately started saying, oh, my god, i'm sorry, i can't believe he did it. i'm so sorry. i'm so sorry. >> reporter: mary ann met with the cops and told them.

id it.os d >> reporter: who was yanos? detectives pressed mary ann for mo. >> she told us that her boyfriend was responsible for this. >> reporter: that's right, boyfriend. she had been having an affair? >> yes. off and on. >> reporter: his full name was yanos koolshar, originally from hungary. once police got the gist of mary ann's tearful confession -- >> she had a picture of him, said here's his address. >> reporter: they high-tailed it over to his apartment in long beach, where they found his car. this was an hour after the murder. sitting all innocent like not far from his door. the officers, having had some experience with this sort of thing, performed a little test to see just how innocent that car was. >> the engine hood was hot to the touch. so it appeared that it had just been driven back.

>> reporter: somebody had been pushing the bug pretty hard. the cops laid low just across the street there and kept an eye on the car. we found one just about like it. and the apartment over there. and sure enough, a few minutes later, out comes yanos. big as life, walking to the car. and his hair was wet as if he just had a shower. >> he said he was going to his brother's house to do laundry. >> reporter: laundry at 6:30 a.m.? seemed a little odd. the more pressing question, why was his car engine hot, especially if he was just now leaving the house? yanos backtracked. he said he left earlier, then returned to the house. >> because he forgot something. came back home. went into the apartment. >> reporter: what did yanos claim he forgot? the laundry. even though cops had spotted a

basket o clothes inside his car before heame o of the apartment. so they searched the car and found nothing. nothing suspicious anyway. no blood or other evidence related to archie mcfarland's murder. same inside the apartment. except there was this one weird thing hanging over the bathtub were -- >> clothes that were wet, a shirt and pants. if he is going to do laundry, why would you spot wash something and leave it hang in your bathroom to dry if you are going to do laundry? go do laundry. >> reporter: he was arrested and taken back to the pd where the detective had 72 hours to compile a case that would convince the d.a. to file murder charges. otherwise, he would be released. he was confident he could wrap this up quickly. >> we had the wet clothes. he buzz was changes his

statements all the time. his girlfriend, our victim's wife, was very positive he was the one responsible for this. >> reporter: he grilled him for hours. but yanos was insistent he had nothing to do with archie mcfarland's murder. crime lab tests didn't find a spec of blood on his clothes or a trace on him. or scratches either. with no history of committing any kind of crime, with was it possible yanos wasn't the killer? the detective had an idea. mary ann wanted to see her former lover in jail. what if they taped the conversation? the two met for the first time since archie's murder as the tape rolled. >> how could you do such a horrible thing and think you are a man? if you get out of here alive, i'll kill you. do you know what you have done? you have destroyed me. >> i didn't do what you accuse me. i did not do it. >> if i had a gun, i would blow your brains out right now.

>> reporter: at one point mary ann became so enraged, she spat on him. >> you did this in the name of love. >> i didn't kill him. i did not kill him. and i don't know anybody who did. >> i hate you with all the passion i can dig up. >> reporter: mary ann's tirade seemed authentic. of course, the cops weren't sure at least at this point if she knew more than she was saying. did you ever think, mary ann has to have been involved in this somehow? >> i don't think she could have been directly involved. but she could have thrown out some ideas to him and he might have taken them on his own. >> reporter: but yanos' guilt seemed clear enough. so he took his case to the d.a. and got a big surprise. without a confession, a witness or a murder weapon, the d.a.'s office refused to gamble on such a circumstantial case. so no charges were filed against

yanos. what was it like watching him walk out of jail? >> it hurts. because you know he's the guy that did it. and he beat the system. >> i was dumfounded. to me, there was so much evidence that it just didn't make sense to me. >> reporter: then mary ann approached the cops with a second proposal to trap her ex-lover into a taped confession. a month after the murder, the two of them met at a local restaurant. >> you tell me then, you tell me what happened? >> nothing happened. why do you think i would do such -- such a thing like this? >> you are not being honest with me. and i know it. >> what do you want to hear? do you want me to lie to you? >> reporter: again, yanos' denials were complete and determined, just like his passion for mary ann.

>> please. >> no. it's the end. this is good-bye. do you understand that? it's good-bye forever. >> reporter: that was that. but, of course, you know how it is with lovers, ex or otherwise. what may sound like the end isn't always. why don't we check back in, say, 20 years. a new detective and prosecutor turn up the heat and suddenly a cold case is red hot again. >> coming up -- >> as soon as i looked at it, i said this guy is good for this murder. yanos truly loved her, love bordering on obsession. >> when "dateline" continues. nu. hi dad. no. don't try to get up. hi, i'm julie, a right at home caregiver. and if i'd been caring for tom's dad, i would have noticed some dizziness that could lead to balance issues. that's because i'm trained to report any changes in behavior, no matter how small, so tom could have peace of mind.

we'll be right there. we have to go. hey, tom. you should try right at home. they're great for us. the right care. right at home. new family connections, every day.llion that's more ways to discover new relatives. people who share your dna. and maybe a whole lot more. order your kit at ancestrydna.com

that goes beyond assuming beingredients are safe...ood to knowing they are. going beyond expectations... because our pets deserve it. beyond. natural pet food. abdominal pain... ...and diarrhea. but it's my anniversary. aw. sorry. we've got other plans. your recurring, unpredictable abdominal pain and diarrhea... ...may be irritable bowel syndrome with diarrhea, or ibs-d. you've tried over-the-counter treatments and lifestyle changes,

but ibs-d can be really frustrating. talk to your doctor about viberzi,... ...a different way to treat ibs-d. viberzi is a prescription medication you take every day that helps proactively manage... ...both abdominal pain and diarrhea at the same time. so you stay ahead of your symptoms. viberzi can cause new or worsening abdominal pain. do not take viberzi if you have no gallbladder, have pancreas or severe liver problems, problems with alcohol abuse, long-lasting or severe constipation, or a bowel or gallbladder blockage. pancreatitis may occur and can lead to hospitalization and death. if you are taking viberzi,... ...you should not take medicines that cause constipation. the most common side effects of viberzi... ...include constipation, nausea, and abdominal pain. stay ahead of ibs-d with viberzi.

it was a mean and bitter christmas for gary mcfarland, the year his father was murdered. the spring of '86 brought no solace. the summer surf lost its appeal. >> the whole thing didn't make sense to me. >> reporter: didn't make sense because no matter how thoroughly gary wished otherwise, yanos was as free as a bird. >> kind of made me question the whole system. >> reporter: the cops were sure yanos killed archie. gary was doubly sure. >> he still is hoofing around,

breathing air and has all the freedoms that you and i have. didn't seem right. >> reporter: perhaps not. but the cops were simply stuck. >> the murder weapon, the confession, or an eyewitness, we didn't have any of that. >> reporter: so the case went cold. not much more the detective could do. >> you put it away and then let some fresh eyes look at it later on down the line and see if there's something you missed. >> reporter: and then a very strange development. not a police issue. but for gary, it was awful. it was a few years after the murder, gary was paying his mom's phone bill. he noticed several calls back and forth to long beach. he dialed the number. and on the other end was yanos. would it be fair to say, it was a bit of a surprise? kind of a shock? >> yeah. >> reporter: when you found out she was seeing him again. >> yes. it was very difficult.

>> reporter: how could she? go back to the lover who gary was sure stabbed his father, her husband, and left him to die in the driveway? >> when i first found out, all ties were cut. i wrote her a letter. dropped it in her mail slot. as far as i'm concerned, our relationship is over. >> reporter: mary ann accused yanos of murder the day it happened. confronted him in jail. now here she was back with him. while they didn't actually move in together, they were certainly a couple, passion apparently undimmed. >> i just believe that in her own mind, that it was okay to go back with him because there was really no proof that he did it. >> reporter: how much mary ann knew, if anything, about yanos' role in her husband's murder, she wasn't saying, certainly not to her son gary. the rift in the relationship between mother and son now seemed irreparable.

for gary, it was like he had lost both his parents. and years passed. the silence continued. gary got married, started his own family. but the loss of his father still haunted him. >> he never got to see me be successful in my career. never got to see me get married. never got to be the grandfather. >> reporter: 17 years went by. 17 awkward christmases. the detective retired. remember that fresh set of eyes he was hoping for? it was 2002 and an aggressive deputy d.a. read about archie mcfarland. >> as soon as i looked at it, i said, this guy is good for this murder. >> reporter: just what police thought at the beginning, of course. difference was, where some d.a.'s avoid circumstantial cases, lewin, who has served as

an nbc news consultant on other stories, loves them. especially the riddles of cases gone cold. he called a regular partner, a veteran detective jim wallace. >> in almost every case there's something you can do. if nothing else, an opportunity to look at the evidence anew. you see if anything was missed. >> reporter: wallace and lewin began by digging into the love triangle. by re-interviewing mary ann, asking about her relationship with both archie and yanos. and about the events that preceded the murder. >> typically, when t murders occur, behaviors start to fall apart. you see the behavior othe murderer become more and more aggressive and the murder occurs. >> reporter: so to the beginning, which was, of course, the love story or the betrayal, call it what you will. mary ann as they discovered was frankly a little bored with archie, but he loved her unreservedly. she knew that. but passion, excitement, not so much.

she was a vibrant woman still and attractive. but 47 and in need of something. and then there he was, yanos. she met him at a local club. he was just 32, 25 years younger than archie. >> he was everything archie wasn't. he satisfied everything that archie couldn't satisfy for her. she told archie she was dating this man. archie was passive about it. she basically told us, if he didn't like it, he could leave. >> reporter: archie, ever easy going, accepted it, hoping his marriage would somehow survive. gary was just 18 then. didn't know for sure about the affair. but suspected his mom was seeing someone, especially the day he caught her sneaking off to take a private telephone call. >> i grabbed the phone from her and said, do you have any idea what you are doing to my family? i hung the phone up.

that's basically when she left. >> reporter: that very day, mary ann moved into yanos' one bedroom apartment, leaving home and kids and, of course, archie. >> he still loved my mom. after she left. he wouldn't let me say anything negative. she's still your mother. she's still my wife. >> reporter: perhaps archie understood the human heart after all. it took a year or so, but mary ann's ardor began to cool. there in that cheap, little apartment. >> the interest she had in being chased, that period rubbed off. after a period of time, it was -- she was certainly still passionately being chased by yanos. but he just became a guy in an apartment. >> reporter: archie had a pension, savings, life insurance. mary ann was almost 50. did she worry also that yanos was too young for her, that maybe his feelings would change? >> eventually, mary ann decides,

you know what? this is stressful. i kind of miss my life. i don't have the security that i had. mary ann decides, i want to move back home. >> reporter: archie welcomed her back forgiving as always. no resentment, no anger? >> he didn't show any. >> reporter: how is that possible? >> that was my dad. >> reporter: across town in long beach, yanos wasn't so forgiving. he was fuming. >> yanos truly loved her. loved bordering on obsession. unfortunately, it takes two people to quit the relationship. and yanos was just not going to accept it. >> reporter: and here in his little apartment, he prepared a secret plan to get her back. coming up -- an old pair of

pants reveals few secrets. >> when i saw the report that he said there was dirt on the pants, that's when the light bulb went off for me. >> when "dateline" continues.

i'm dara brown. >> president trump used twitter and a saturday news conference to fight back against questions about his mental competence raised in a new book. the president says, quote, my two greatest assets have been mental stability and being like really smart. the bitter cold snap hitting the northeast is expected to continue on sunday. single digit temperatures were recorded saturday in cities like philadelphia, new york and baltimore. with windchill making it feel even colder. >> now backo "dat welcome back to "dateline." i'm craig melvin. two decades after archie mcfarland had been murdered,

investigators were digging up details about his wife's younger boyfriend. here's keith morrison. >> reporter: the phone calls did not stop. mary ann mcfarland moved back home to archie, but her spurned lover yanos wouldn't move on. >> my dad is like, why does he keep calling? she's like, i don't know. the whole aura of this guy was that he wasn't accepting it. >> reporter: in fact, as the d.a. and the detective reviewed the evidence, they encountered a man who seemed obsessed, who first pleaded with mary ann, then began using language that sounded more threatening. >> i want you to come back to me kind of statements. and then, you better come back. she was afraid he would skin her alive. she told her -- >> reporter: skin her alive? >> if she didn't come back to him. >> reporter: but yanos wouldn't stop calling or even making threats over the phone to

archie. >> and archie hung up on him. he called back immediately. don't hang up on me. unless you call me back, i'm going to get you. >> reporter: next day, he showed up at the mcfarland's house carrying a small pouch. mary ann was in the shower. archie let him in. the two started talking. then mary ann entered the room. >> yanos says, darling, come sit over be me. mary ann, you know, puts the hammer down and says it's over. >> reporter: yanos, perhaps upset, went to the bathroom. mary ann was curious about the pouch he brought with him, took a peek. >> inside is a loaded semiautomatic firearm. ready to go. an extra magazine. >> reporter: yanos later told mary ann, that his plan, if she refused to come away with him, was to go outside and kill himself with that gun. >> our theory was if you're planning on killing yourself in the front yard, you don't need to bring the gun into the house. you don't need to have an extra magazine with you. i believe that something much

more sinister was going to happen that day. >> reporter: in fact, nothing happened. yanos went home. but he came back here to mary ann's house a few days later. it was on the friday before the murder. he met with mary ann alone. and had an epiphany. it was something he referred to in one of the conversations the police recorded between yanos and mary ann. >> reporter: clicked? what did he mean by that? >> he realized, you know what? she doesn't love archie, she's not going back to archie because she loves him. she loves me. if i could just find a way to get rid of archie, i don't need to kill myself, if i get rid of

him, i get the girl, she gets his security a, and he's out of the way. >> six days later, he is dead. >> reporter: they now believe they had a motive. but that didn't mean yanos did commit the murder either. they still needed something, anything, to connect him to the bloody crime scene. >> i knew there would always be a question about how does yanos get away without getting any blood on him. if there's no piece at all, i think there's lingering doubt. >> reporter: the kind of doubt that just might trip up a jury. so wallace took a long, hard look at the original police report. >> i have a case where it's very visual. for me, everything comes down to, can i see it again? >> reporter: as wallace poured over the photographs, he could see something was off, didn't make sense. archie had been stabbed four times. there was plenty of blood around. if yanos did the stabbing, some of that blood must have wound up

on him, on his clothes. wallace knew that the crime lab never found a trace of blood back in 1985, but now he needed to know why not. >> he does the murder. where did you go next? i know this. when they got to his house, he had wet clothing. one pair of pants, one shirt. in other words it's one outfit that needed washing on that day, on the day he told us he was going to go to his brother's to do the wash. what is it about that one outfit that needed a washing that day? >> reporter: back in 1985, those clothes were tested for blood using a chemical called luminol. >> you spray it on the clothing. it will lieueny ness in the areas you have body fluids. blood is a body fluid. it turns out the pants were glowing in two areas, two important areas, but when they tested them for the presence of blood they were never for blood. something was there but not blood. >> reporter: now two decades

since archie's murder, wallace found yanos' clothes. they were still in the evidence locker. he sent them to the crime lab for retesting. once again there wasn't a spec of blood on the clothes but there was something on those pants. yanos had supposedly washed them and hung them up to dry. but still, there it was, something very strange. dirt and mud stains all over the pants. when i saw the report he said there was dirt on the pants, that's when the lightbulb went off for me. coming up, caught on tape. caught in a lie. >> so this is something you arranged with your brother? >> well, yeah. >> we sent detectives out to interview the brother afterwards. he didn't know the story that yanos had given. >> do detectives have enough evidence to arrest yanos? when "dateline" continues.

>> reporter: sometimes the biggest breakthrough in a murder case can come from the most unassuming clues. for the detective, it was something buried in a routine crime lab report. yanos' pants, which he washed the morning of the murder and hung up to dry in his shower again tested negative for blood. but this time the lab report noted something else found on

those pants which caught the eye of detective wallace. dirt. >> if you are washing these pants, what is the goal? aren't you trying to wash the dirt out? >> reporter: you think. >> in this case the dirt was present, except there was luminol glowing. >> reporter: the chemical police used to detect blood and body fluid. this didn't make sense. with no blood on the pants, the luminol was highlighting something else on two very specific areas of the pants. >> one on each side, right at the area of the knee, on the front of the pants. >> reporter: if you were kneeling down in something? >> if you were kneeling down in something that you later wanted to get out by spot cleaning it with detergent, and you actually did get it out, this would glow as we saw it. it will glow because cleaning detergents also make it glow. so you think you have blood, you have cleaning detergent. >> so those pants that yanos

apparently washed the morning of the murder were still dirty except for the knees. why were they spot cleaned there? wallace went back to the autopsy report. archie's fatal stab wounds were to his torso, doesn't make sense the killer would stab him there while kneeling but there was the other wound. remember the peculiar one near archie's groin? >> where would that person have to be relative to the victim to make that kind of an energy, i -- kind of an injury, and i think it would put you on your knees to do it. you look at that and the spot cleaning on the pants you have a pretty good description of how he got blood on his pants and what he had to do to get it off. >> finally, some physical evidence? but was it enough? the d.a. didn't think so. he needed more evidence to file murder charges. >> i wanted to get yanos on tape, so the detectives went out and they contacted yanos kalcsar. >> he worked in a shop preparing electronics, detectives showed

up with a hidden tape recorder to ask him all these years later about the murder aut tt da he remembered every detail he said vividly. >> what were you going out to your car for? >> i was going out to my brother's. i remember it very good because the kids get ready to go to school because my brother was working nighttime. >> oh. so this is something you arranged with your brother? >> well, yeah. >> wait a minute? didn't he say back then he was going to do laundry? >> his version was his brother called him because a babysitter had to go to school and he had to take over baby sitting that morning and he was on his way to the house to baby sit. >> the baby sitting thing was a brand new alibi. he never mentioned that before. >> we sent detectives out to interview the brother afterwards. he didn't know the story janos had given. so that pushed me over the top. >> a few weeks later cops

returned back to the shop, this time to arrest him. >> he was there working on a flat screen tv in the middle of it, trying to put things away in a certain position like he's going to come back. it's not like you have to put your tools away to in back tomorrow. >> word about the arrest spread fast, first to gary who waited 25 years. >> completely, 100% happy. after so much time goes by you think it's a fore gone conclusion, it's over. everyone moves on with life. >> including, of course, mary ann, who had moved on with janos. didn't just go to him for a little while, in fact, spent the last 20 pluses years with janos, the same man she herself once accused of killing her husband but as it turned out janos was the only man in her life ever since archie was murdered. >> she loves janos and does not want to believe he's a killer.

>> reporter: in the summer of 2011, two and a half decades after archie mcfarland was murdered, the case against janos came to court. of course the prosecution's star witness was mary ann mcfarland. what did she know and what would she admit? could her testimony sink her lover or maybe save him? coming up, tough questions. >> let me make it very simple. are you in love with him? >> and raw emotions. >> i'm so sorry. i'm so sorry, son. and she went hysterical. she lost it. >> when "dateline" continues. r d prescriptions? at walgreens, we'll help you save more with copays as low as $0 and reward points on prescriptions.

so, no matter who you are or where you're headed, it's worth the trip. we'll help you find low cost prescriptions with copays as low as zero dollars on medicare part d. walgreens. trusted since 1901. ♪ if you wear a denture, you not only want a clean feeling every day, you want your denture to be stain free. did you know there's a specialty cleanser that's gentle enough for everyday use and cleans better than regular toothpaste? try polident cleanser. it has a four in one cleaning system that kills ten times more odor causing bacteria than regular toothpaste, deep cleans where brushing may miss, helps remove tough stains, and maintains the original color of your dentures when used daily. for a cleaner, fresher, brighter denture, use polident every day. use pantene shampoo together with 3 minute miracle daily conditioner. their pro-v formula is like a multi-vitamin. making your hair 2x stronger see the difference when you add 3 minute miracle daily

conditioner. so that's the idea. what do you think? hate to play devil's advocate but... i kind of feel like it's a game changer. i wouldn't go that far. are you there? he's probably on mute. yeah... gary won't like it. why? because he's gary. (phone ringing) what? keep going! yeah... (laughs) (voice on phone) it's not millennial enough. there are a lot of ways to say no. thank you so much. thank you! so we're doing it. yes! "we got a yes!" start saying yes to your company's best ideas. let us help with money and know-how, so you can get business done. american express open. i was wondering if an electric toothbrusthan a manual.s better and my hygienist says it does but they're not all the same. who knew? i had no idea. so she said, look for one that's shaped like a dental tool with a round brush head. go pro with oral-b. oral-b's rounded brush head surrounds each tooth to gently

remove more plaque. and unlike sonicare, oral-b is the only electric toothbrush brand accepted by the american dental association for its effectiveness and safety. my mouth feels so clean. i'll only use an oral-b. oral-b. brush like a pro.

>> june 2011, archie mcfarland had been dead more than 25 years. janos kulcsar was 60 now, just about the same age archie was when he was murdered and as janos sat here in court, silent and watching, the prosecutor sought out to find justice, much delayed. though his case as he admitted to the jury, was very much circumstantial and really didn't feature much new evidence. >> janos kulcsar woke up on december 19, 1985 with a plan.

this man decided, came to the conclusion, that archie mcfarland was in his way and needed to die. >> the defense argued the evidence was thin. no blood, no murder weapon. no witnesses. and dna found under archie's finger nails, it had now been determined, did not match janos. >> even if everybody right away thinks that janos kulcsar is the killer there has to be prove beyond a reasonable doubt. >>, of course, gary mcfarland as you know, had no doubt that janos killed archie. he told the jury about that awful defense morning when he discovered his dad dead on the driveway and knew instantly who did it. >> i turned around, looked at my mom, and said i can't believe [bleep] you know exactly what. she goes, i'm so sorry. i'm so sorry. i can't believe he'd do this. i'm so sorry. i'm so sorry, son.

she was just -- she went hysterical. she lost it. >> so difficult to rein in the emotion even all these years later. easier for gary to listen to the prosecution present the evidence suggesting the man spot-cleaned the knees of dirty pants to wash away just the blood. easier for him to listen to the prosecution pick apart janos' changing alibis. and janos, he never took the stand, just listened stoically as his attorney argued those changing stories were simply honest mistakes. >> when you ask somebody to remember something from 25 years ago, they're not going to remember every single detail, every single thing that they did. >> but d.a. lieuin' had someone, a witness who would remember the whole story. that is if she chose to. the woman who accused her lover

of murdering her husband and then resumed her affair with him. so under oath what would mary ann mcfarland say about janos kulcsar now? d.a. leyin didn't believe mary ann was involved in the murder, but now, she she protect her lover, or help prosecute him? for two days, their battle of wills misherrized the courtroom. as the two duelled over mary ann's relationship with janos. >> let me make it very simple. are you in love with him? >> no. >> you're not? over the past 30 years have you been involved with anybody else? >> no. we're friends and companions. >> companions. ma'am, during that 30 years you were having sex with him, correct? >> yes. >> i assume you have friends and companions you don't have sexual relationships with, right? >> no. >> so he's the man in your life, is that correct? >> yes.

>> mary ann, now 75 years old, seemed evasive, her usually sharp memory often fuzzy. >> that's all i recall. i don't know. i misunderstood your question. >> watching all this with mixed emotions was mary ann's son gary even after all these years their relationship has never fully recovered. >> it was tough on her. i know she felt like she was on trial. but a lot of the stuff they went over and they pinned her on was to explain the mindset of janos and the whole circumstances that led to this. and it was necessary, but it was tough. >> finally, after three weeks, it was up to the jury to decide. then, after just two hours. >> has the jury reached a verdict? >> yes, we have. >> we the jury in the above entitled action find the

defendant, janos kulcsar, guilty of the crime of murder. >> it was just relief. it was like a big weight was lifted off my shoulder. janos got a free 25-year ticket that most people who commit a murder don't get. >> conspicuously absent on the day that finally brought justice for her late husband, and a conviction for her lover, was mary ann mcfarland. >> she does not want want to believe he did this, for a lot of reasons. if mary ann were to accept he committed this crime, she admitted that she would hold herself morally responsible. so some people decide i'm not going to accept reality unless it absolutely punches me in the face. and i guess we didn't punch hard enough. >> reality for janos kulcsar,

the man she loved, the man now convicted of murdering her husband, is the almost certain prospect of spending the rest of his days in prison. in january 2012, janos was sentenced to 26 years to life. just about the same amount of time he spent with mary ann. his attorney has appealed the case. occasionally you'll still find gary mcfarland at the beach where his dad archie brought him to surf. he thinks about father and mother and forgiveness. the lesson gary is still learning from archie mcfarland. >> i still love my mother. i don't harbor bitterness or resentment. there are tons of questions you'd love to ask and get answers to, but i'm not in a

position, nor in my opinion anyone is in a positn, to completely understand what's going on in somebody else's heart. >> that's all for this edition of be "dateline." i'm craig melvin, thanks for watching. good morning, i'm dara brown in new york at msnbc world headquarters. it's 7:00 in the east, 4:00 out west, and here's what's happening. the president at camp david and on camera, trying to set the record straight about a wide range of topics, including his mental health, steve bannon, and the explosive revelations in a new book. >> excellent student, came out, made billions and billions of dollars. i consider it a work of fiction. i don't know this man. i guess sloppy steve brought him into the white house quite a bit. i think we're going to have some really great bipartisan bills. we want the wall.

e