let me get this straight. you have an unknown assailant break in, shoot him dead, and leave him? it doesn't make sense. >> right between the lines. >> an intruder over her husband's dead body. >> but then the widow changes her story. and keeps changing it. >> what was the first thing that went through your mind? >> staged. >> tonight, she's pointing fi fingers in every direction.

who is she trying to protect? or destroy? truth or consequences. plus, be careful who you break up with. when a woman, let down by her ex, unleashes her fury. and an avalanche of lies. cyber stalking. and an avalanche of lies. cyber stalking. and sending naked photos to his co-workers. tonight, we're stalking the stalker for the truth. right between the lines. here's david muir. >> good evening. tonight here, a mother, a wife, living in her beautiful home. an indude eintruder breaks in as

her husband dead. but matt gutman with the truth in between the lies. >> reporter: drill a well in keller, texas, you don't get crude, you get cash. and 40 year old gregg williams was rolling in it, a self-made businessman, getting rich with his computer security company. now sharing a little palace on the prairie with his wife, 42 year old, michele, and their 4 year old daughter, mikayla. gregg and michele both twice divorced, but it felt like this third marriage would be the charm. michele's grown sons from previous relationships, lee and andrew o'brien, say her marriage to gregg was a fairy tale. >> he always treated her like a queen. >> anything she wanted, she got. >> reporter: the family renting a mcmansion with a pool out back, his and her mercedes in the garage. >> money. he's got the money, he's got the party lifestyle. he's accomplished, and he's head over heels for her. >> reporter: quite a change for the woman who had struggled as a teen mom to raise three kids, living hand to mouth.

>> we were living in motel rooms if we could, bouncing around, couch surfing. >> reporter: michele, now the kind of bride who shows a little leg. gregg, the kind of guy who buys his wife a yogurt shop to keep her busy. perfect, what with her new taste for the sweet life. gregg spending his spare time on alpha-male activities, karate chopping cinder blocks and body building. >> he was like a frat boy, like literally, through and through. he was a jock, but a genius at the same time. >> reporter: but one october night, the cowboy camelot came to an end with a single gunshot. >> 911, where is the emergency? >> reporter: that's michele williams, calling for help. gregg has been shot. >> someone shot my husband! >> reporter: this is actual police dash cam video from some of the first officers arriving on the scene when they discover michele distraught with a nasty goose egg on her cheek. >> who else is in the house? >> my 4 year old and my husband.

>> your 4 year old and the husband? >> reporter: hoping to shed more light on the attack, police bring michele, their only witness, down to the station. then, as a sympathetic officer holds her hand michele tells sergeant john mcgrew an unbelievable story. >> walk me through the story that she told you. >> she was asleep. woke up by an intruder. >> reporter: michele says she woke up as an intruder in black was breaking in through a back door. the bandit passed by 4-year-old mikayla asleep on the living room couch, and approached the bedroom. there, he ran into michele, and knocked her out. >> she was struck by an unknown object. >> reporter: police later find a wrench at the scene, the right size to plant that painful bump on her cheek. >> that's what actually kind of knocked. >> it knocked me out. >> reporter: michele says she is still groggy when she sees the man in black standing over gregg. there is a gunshot. and the intruder disappears through a back door.

>> i screamed and i ran over to greg. and i reached for him. i grabbed ahold of his hand. and i saw blood running down the bed. >> reporter: gregg has been shot once in the head. and eventually, there in the interview room, sergeant mcgrew informs michele, her husband is dead. >> there's not much i can say in this. gregg is deceased. >> reporter: the widow williams is inconsolable. >> reporter: the story catches the eye of the media, including tv's queen of crime, nancy grace. >> cops find daddy, shot dead in his own bed. >> reporter: who was the intruder in black who shot gregg? turns out there is no shortage of suspects, because gregg's gilded life had a gritty side. >> he had an edge to him. rubbed people the wrong way. >> he knows drug dealers and bad

people. he's kind of like a dr. jekyll, mr. hyde. >> reporter: michele, trying to help identify that killer in black, mentions others police might want to talk to, including gregg's ex-wife kathy williams. >> him and his ex-wife fight a lot. >> reporter: she doesn't mention the two men in the world who may have disliked gregg the most. his stepsons, army vets, andrew and lee o'brien. how much did you not like him? >> i hated him. i -- i don't throw that word around lightly, but i literally hated him. >> reporter: as sometimes happens, the stepchildren felt unwanted and unwelcome by their mother's new husband. was there ever a point that you were happy that he was dead? >> yes. immediately. when they told me he was dead, it was like, "cool, whatever, how's mom?" >> reporter: both you and your brother openly say you despised greg. >> uh-huh. >> reporter: did you have anything to do with his murder? >> no. >> reporter: but police are beginning to wonder whether there was an intruder at all. keller police captain brenda

slovak, the lead investigator, drives us to the big house on jacob avenue. and back to the night of the shooting. >> and from right here, you could see the body? >> correct. i could see him in the bed. >> reporter: but in that bedroom, there is not a single sign of a struggle. and in a house loaded with valuables and $20,000 in cash, the killer takes nothing and, leaves nothing. did you ever find fibers or any dna evidence or any other kind of evidence of an intruder? >> no. >> so, what? you have an unknown assailant break into his home. shoot him dead, and leave, for what? >> reporter: and then police practically trip over the most important evidence in the case, right here in these crime scene photos. the murder weapon. the very recently smoking gun. gregg's gun. yep, shot with his own gun. >> if someone's going to come into the home and try and do you some harm, normally you would bring your own gun. >> reporter: and right next to

the gun, the fired shell casing and the wrench possibly used to hit michele. arranged, neat as a pawn shop show case. you saw this picture, what was the first thing that went through your mind? >> staged. staged. >> reporter: when you were sitting across from her, did you ever think that this woman is lying to me? >> oh, yes, sir. >> reporter: back at the police station a suspicious sergeant mcgrew tells michele the crime scene suggests only two possibilities. either she shot gregg, or gregg shot himself. >> i did not hurt my husband and he did not hurt himself. there was a man in my house. >> reporter: she denies it, no fewer than six times, until this moment. >> if he self inflicted it, you need to tell me. i mean, this is it. we're getting to wit's end. you've got to be honest with me, michele. if he did it and you covered it up, just tell me. >> he did.#, >> huh? >> he did. >> and she said, "he did it." he did it.

>> she immediately folds, and went, ah, okay, you got me. he shot himself. >> reporter: michele admits she's told a pack of lies and now offers a second version of gregg's death. michele now says, she was sleeping on the couch with 4-year-old mikayla. she hears the gunshot, and goes into the bedroom to find gregg had shot himself. she cleaned it all up and arranged things to look like a home invasion. >> i knew i had to make it look as if there was a burglary. >> reporter: and get this, to really sell the story, michele says she hit herself in the face with that wrench. >> i went like that, thinking i would just have a little bruise. and that really backfired bad. >> reporter: michele says she only wanted to protect their 4 year old daughter mikayla, and gregg's reputation. after spending five hours in the interrogation room, police finally release michele, who soon finds consolation in comfort food. >> the very morning after michele williams goes out to breakfast to ihop and basically

orders the lumberjack breakfast. she's not worried about her dead husband at all. she's living it up. sausage, pancakes, eggs, the works. >> reporter: but police are finding michele's stories hard to swallow. they have more questions than ever about the night gregg died. like, how did 4-year-old mikayla sleep through a shooting in the next room? somehow, mikayla, their daughter, slept through it all. how is that possible? >> reporter: could clues from a little girl unravel the mystery of her father's death? stay with us. scratch craig? your choice. what are you doing with that key jake? i'm thinking of scratching your car. well, you should stop thinking that. you're a little too precious with it. don't touch my dart, jake common it's for your own good, you'll thank me later. move out of the way, so you don't get hurt, i mean it. it's gonna happen, might as well be from a friend. jake... step back, jake.

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right between the lies continues. once again, matt gutman. >> reporter: a curious feature story on the website of the ft. worth, texas, newspaper about a new kettle bell workout club. the owner is one shelley williams, who may look familiar, because at the time, she's the most infamous widow in texas. her husband gregg, shot in the head in their king size bed, in their king size house. but now, less than a year after

cremating her husband, michele is the very picture of a merry widow. >> it's very upbeat, it's fast. everybody has a good time with it. >> reporter: also having a good time, michele's employee gene wallis. >> we're in a group atmosphere so it pushes you more than you can push yourself. >> reporter: you could call him an employee with benefits. a dozen years younger than michele, they're now a couple. much has happened since that interrogation room where michele told two different stories about how her husband wound up with a bullet in his head. first she said it was murder. then suicide. but police have been weighing the evidence. based on the angle of the gunshot wound and other forensics, the medical examiner eliminated suicide, and ruled gregg williams' death a homicide. and remember, the crime scene showed no sign of an intruder. >> crime scenes don't lie. people do. >> reporter: something else bothered police, how that little girl, gregg and michele's daughter mikayla, slept right through a shooting in the next

room. >> i think it's a reasonable possibility that children's tylenol, or something else, was administered to the child. >> reporter: some sort of drug to make her sleep. >> yeah. >> reporter: police concluded only one person could have shot gregg -- his own wife, michele williams. the motive, insurance that would pay out the better part of a million dollars. that sobbing in the interrogation room when the cops told her greg was dead? crocodile tears. she was arrested and charged with murder. but michele doesn't sweat the small stuff. soon out on bail, there she is, swinging kettle bells with her new boyfriend. her mind was also getting a workout. she tells her son andrew o'brien, it really was murder. what's more, now she wonders whether the killer might be her own son, andrew's brother lee. >> she asked me, she said, "do you think your brother could

have done it?" she asked me if her own son could have killed gregg. >> she had to plant a reasonable doubt that someone else could have been there that night, someone else could have squeezed that trigger. >> reporter: by pinning it on you. >> yes. >> reporter: but police say lee and andrew o'brien both have strong alibis. the brothers say they began to realize mommy dearest might be a monster. >> she doesn't even know what reality is anymore. she's been lying so long, and i think that somewhere along the way, reality -- reality left. and so she just kept going. she knew nothing else. and so she just kept going. she knew nothing else. lie after lie. >> she would attempt to kill

dogs. if someone had a salt water fish tank, she would pour ajax in there and kill fish. >> reporter: in texas a murder charge can land you on death row. but not michele. her luck holds out. >> i don't know how she managed to do it. but michele williams managed to finagle a plea deal out of the state. >> reporter: prosecutors say michele cleaned the crime scene so well, they didn't have much of a case. >> this is a circumstantial evidence case, there's no doubt about it. of course not in small measure because she had altered the crime scene. >> reporter: the deal, announced in a press release, requires michele to plead guilty not to the murder charge in the indictment but tampering with evidence and deadly conduct. the recommended sentence will be just 18 years. in a jailhouse interview, michele seems pleased with her bargain. >> with a plea deal i'm looking at a couple years before i'm out for parole. i'm actually, if you could say, looking forward to getting the

sentencing over with so i can start moving towards the end of this hell. >> reporter: but before she can be sentenced, michele has another surprise. >> she's pregnant. just before sentencing. and not only is she pregnant. she's pregnant with twins. >> reporter: sentencing was deferred until after michele's due date. but prosecutors say the pregnancy turns out to be another lie to delay prison. the conception was an immaculate deception. but then michele makes the mistake of a lifetime. she grants an interview to the national tv crime show "48 hours." >> did you murder your husband gregg? >> no, i did not. >> reporter: there she goes again. michele flip-flops on her story. she tells "48 hours" she's an innocent woman. and she pulls an old tried and untrue story out of mothballs.

the man in black did it. >> there was an intruder in the house and that person killed my husband. >> so she had already pled guilty, and then she gets on national television and says, well, what i really meant was, i'm not guilty. what i really meant is, an intruder came in, and i really meant that i have a good idea who the intruder was. >> reporter: it doesn't play well with the judge. he revokes the plea deal and orders michele to stand trial for murder. the woman accused of shooting her husband in the head just shot herself in the foot. >> you have a fifth amendment right to remain silent for a reason. our u.s. constitution protects you from the actions of the state. what the u.s. constitution cannot protect you from is yourself. >> reporter: when we come back, court is in session. michele drags gregg's ex-wife kathy back in the picture. could she be michele's get out of jail card? >> i was in shock.

>> reporter: stay with us.

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"20/20" continues with matt

gutman. >> reporter: at the tarrant county courthouse in ft. worth, texas, it's finally time for truth and consequences. michele williams is on trial for the murder of her husband gregg. >> this story continues to evolve. >> reporter: the media following every twist and turn in the murder case. >> the motive was money. tried and true, age old, money. >> reporter: a fraud examiner says the williams finances were mismanaged. >> lots of problems here, right? >> they tended to be living beyond their means. >> they both had their respective jobs in this case. and his job was to make money, and her job was to spend money. and they were both very good at their jobs. >> reporter: and prosecutors lay out their theory. gregg and michele fought over money that night. gregg hit michele or threw something, causing that goose egg on her cheek. >> it's our suspicion that this is an injury that was caused in a fracas with her husband, earlier in the evening, that led

to, led to his demise. >> reporter: provoked, michele enacted a plan that would get her revenge, and riches. prosecutors say after gregg fell asleep, michele shot him dead with his own gun, then arranging the evidence and cleaning up the crime scene to look like the the evidence and cleaning up the crime scene to look like the killer was an intruder. michele brought to tears as gruesome photos of her dead husband are shown. prosecutors are so successful in painting michele as a pants-on-fire caliber liar. >> she lied about it, she lied about it, and when she finished lying about it she kept on lying about it. >> reporter: her defense attorneys are forced to make a startling admission in open court. >> probably, at this point, you've made up your mind and rightly so that michele, she lies. >> reporter: but the most devastating witness to take the stand. >> it's her own son. her own adult son. it's andrew o'brien. >> reporter: he testifies his

mother had concocted yet another whopper to save herself. she asked him to set up gregg's ex-wife kathy williams as the killer. >> michele asked me to call some friends and have them frame kathy. she said, "i need you to call a friend, tell 'em, go to walmart. buy an extra large sweater. take that sweater out the woods somewhere. fire a pistol so that the somewhere. fire a pistol so that the gunpowder gets on it.'" >> reporter: and to plant it in kathy's car where police would find it. you were brought up to the witness stand to testify about your mother, how did you feel? >> god, that was probably the worst feeling i've ever had, when they asked me to point to michele williams. i could not make eye contact. >> reporter: as the defense presents its case, michele williams' court appointed attorneys say gregg was actually worth more to her alive. >> gregg was michele's golden goose. he brought in over $500,000 in 2010 and over $800,000 in

2011. so what was her motive? >> reporter: so how did he die? they go with michelle's story number two, remember, that was the suicide theory? >> gregg took his own life. that's what the physical evidence supports. >> what do we know about greg williams? we know that he, he was competent in handling a firearm. we know that he was using steroids. >> reporter: michele's attorneys argue gregg was driven to suicide by a plague of problems. money trouble. issues with his teenage daughter from a previous marriage and the recent suicide of a close friend. nonsense, according to gregg's mother. she says he was loving life. >> he was very happy and bubbly and telling me all about the plans he had for the new house they were buying. >> reporter: prosecutors question whether suicide was even physically possible. crucially, a gun expert testifies gregg was not, as you might expect in a suicide, shot at close range.

>> the muzzle was further than 6 inches and closer than 24. >> this is 24 inches. >> reporter: prosecutors demonstrate the acrobatics required to have pulled the trigger from that distance. >> does it make any sense to you at all, that somebody would lay back in their bed and hold this gun 11 inches away from their own head and fire into their head? >> how do you get your hand to do that? how do you cock your wrist to do this? >> reporter: the prosecution seemed very convincing. people who commit suicide don't do it that way. >> he was a bodybuilder. i'm sure this was a pretty common stance for him. so, it wouldn't be -- it's not farfetched that he would've just done this. >> reporter: another problem with the suicide theory, pointed out to us at the crime scene. although gregg's left hand is in view, his right hand, his shooting hand, was tucked under the covers.

so he would have had to shot himself and then put his hand under the comforter? >> correct. >> reporter: in their final defense of the suicide theory, michele's attorneys try to explain why she concocted the intruder story and staged the crime scene. >> she's not a career criminal, ladies and gentlemen. this is not something she had time to think about. she panicked. time to think about. she panicked. she was working, like i said, to protect her baby girl mikayla who was in the other room. she has tried to pull the wool over the eyes of family and friends and police and prosecutors and courts, the media, the community and ultimately, you. don't let her get away with it. >> reporter: after all michele's pinocchio moments, the intruder in black. the suicide theory. the imaginary twins. the jury comes back, and hits michele right between the lies. >> mrs. williams, if you would stand please.

the verdict says we the jury find the defendant michele marie williams guilty of the offense of murder as charged in the indictment. >> reporter: michele williams who had once been offered a plea deal of 18 years, is now sentenced to 60. do you think she could've gotten away with it? >> i think she could've gotten away with it. if she had come up with the, with the suicide story, and stuck with the suicide story, she could've gotten away with it. >> reporter: what do you think was the one thing that kept her away from freedom? >> the fact that she couldn't keep her mouth shut. >> reporter: instead, michele is serving what amounts to a life sentence. it's little solace for andrew who already considers his mother dead to him. would you say you have a mother? >> no. i don't like to even consider her my mother. i had someone who gave birth to me and that's it. >> reporter: but he acknowledges his twisted relationship with his mendacious mother has given him at least some direction. >> she taught me exactly what not to do in life. and i've learned pretty well from it. >> reporter: so you learned from example from her? >> right. >> reporter: what not to do?

>> exactly. and that's what i focus on, is my family and my kids. and giving them everything i didn't have. >> so, what do you think about that mom? matt is live tweeting with the rest of us tonight. use #abc2020. coming up, when a casual breakoff leads to all-out war on an ex-boyfriend. but wait until you see the photo she sent to his coworkers, and the bucket of lies she used to destroy him. her to-do list is done, and so destroy him. her to-do list is done, and so is she when we track her

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well, we've all heard the song, breaking up is hard to do. but next, it turns into a true nightmare. a woman willing to do anything and we mean anything, to destroy her ex. here again, matt gutman. >> reporter: while coaching his son's football team, joe good was bowled over. not by the play, but by the pretty blond on the sidelines, tawny blazejowski. >> you know, her son was on the same team as my son. and then we started dating after when i got divorced. >> reporter: joe and tawny could have been a modern day brady bunch. tawny is mom to four, joe is father of two, each with a divorce under their belt, and together they found passion. >> she was a lot of fun. >> reporter: and what the smiles on boozy caribbean cruises tell

in pictures, tawny's love letters tell in words. >> she's very passionate and enthusiastic in everything she does. >> reporter: and were you ever in love with her? >> yeah, i was in love with her. >> reporter: their love blossoms here along the shores of sunny st. augustine, florida. life, for a time at least, is heavenly. joe lives here on paradise pond road, managing insurance claims for a national company. tawny, tucked away in this nearby cozy cul-de-sac. and after two years of dating, joe proposes. here's the ring and here's tawny's excited facebook post. but when joe drags his feet on setting a date, tawny drags him under. did you ever get any indication that there might have been something a little bit off with her? >> there were red flags. she would get upset. >> reporter: it didn't go away? >> no. they kept on. the timeframe between when she'd get mad got shorter and shorter. and it escalated until finally she asked me, do you want me to just go ahead and cancel the vacation i've got planned for

you? and i said, yeah, sure. i'm tired of this crap. >> reporter: the engagement is now very off. so you called her bluff? >> yeah. immediately the phone rang and she was, are you sure this is what you want? because i got everything lined up that i'm going to ruin you. and i'm like, what? about a half hour after that conversation i get a text message on my phone that my yahoo password had been changed. >> reporter: the bond that almost led to marriage breaks in the time it takes to send an e-mail. tawny, scorned, hacks joe's personal e-mail account, and an epic cyber-stalking campaign begins. first campaign stop? joe's employer. >> that night i just went to bed, got up the next morning real early, went into work, opened up my work e-mail and there's 14 e-mails that i was cc'd on and they were sent to the ceos of the company. >> reporter: saying what? >> pornographic pictures.

>> reporter: and not just any pornographic pictures. one of them features joe in, well, happier times. we won't go any lower. but tawny would. she fedexes these packages to all of the members of his company's board. inside -- sex toys, and condoms. as if your colleagues seeing you naked isn't the stuff of nightmares, surprise. the torment really begins with a polite knock on the door at 2:00 a.m. >> the night of october 19th things changed. >> what happened that night? >> 1:30, opened up the door and there's a police officer and he goes, mr. good? step on out here. so do you want to tell me what happened? did you and your girlfriend have a little altercation tonight? i was like, "what are you talking about?" >> reporter: in the middle of the night, tawny drives to the sheriff's office.

the pictures of her bloody face show what she told cops that night -- joe beat her. do you think she had it in her to whack herself in the face? >> oh yeah. >> reporter: she was able to exploit these systems that are there to actually protect us. systems that we have faith in. >> oh, yeah. i ended up going to jail that night. because here's the thing. the girl says a guy hit her. most people think, wow, the guy hit her. they don't think the girl's lying. >> reporter: despite joe's alibi, a judge slaps him with a protection order which tawny uses to get joe arrested a second time. she tells the cops joe is making harassing calls, threatening her life. how does she pull this off? she's become an expert in spoofing. a cyberstalking trick that makes it seem as if joe is calling tawny, even when he's not. >> so, she now calling the police saying that i'm calling her, breaking the injunction order. >> reporter: then tawny spoofs again, making it appear as if joe's threatening her from his work number. and this time, she says she's

got the voicemails to prove it. listen. >> i still have a gun. i know where you are and i'm coming for you. i should have killed you. >> reporter: we now know it's probably tawny digitally manipulating her voice. but back then cops hadn't caught on yet, and they arrest joe for a third time. by now, his employer has had it. they fire joe. during all this, joe takes a little vacation with his new girlfriend, mariela murphy. one wonders why he'd ever return. but when he does -- >> there's airport security asking, are you mr. good? yes, sir. step over here with me. they got a tip that i was smuggling drugs in from d.c. >> found nothing, of course. >> found nothing. i said, there's aspirin in there and that's the strongest you're gonna get. somehow she found out that i was going to d.c. >> reporter: as if all this isn't frightening enough, tawny is about to tighten the screws, entering even more dangerous and demented territory. listen to this. it's tawny, calling a florida

abuse hotline. >> there was allegations of him having sex with his daughter. and he's provided all his children with alcohol. >> reporter: but tawny's just getting warmed up. >> he himself gets drunk, he is having sex with these young teenage girls because he's into child pornography. >> reporter: did that ever happen? >> no, no. >> reporter: but still, investigators don't believe joe. after all, he's been arrested three times. growing bolder, tawny now makes it dangerous to just know joe, finding fresh meat in joe's colleague at work, jenny robor, and, weirdly, joe's new girlfriend's landlord, doug duggan. >> she did a crimestoppers tip to me, accusing me of allegations against my kids. >> reporter: making pornography with your children? >> yes, yes. >> reporter: so she accused you of being the most horrible type of pedophile. >> the things that are on there, i can't even repeat, they're so horrible. >> reporter: it's hard to imagine tawny stooping any

lower, but she has. now involving the children of relative strangers. as for mr. duggan, joe's girlfriend's landlord? he also gets an anonymous threat, this time through the u.s. postal service. we now know it's another special delivery from tawny blazejowski. threatening to burn his house down. burn it down. >> yeah. i spent a couple of sleepless nights wondering if the house is going to burn this night. >> reporter: but soon, we turn up the heat on tawny. >> no one's talking, go away! >> reporter: stay with us. >> and matt does not give up. what we're about to show you, what was found in the house. a to-do list you won't believe.

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tiny sharon is mean. i'm right here. watch any channel live on any device around your home. the x1 entertainment operating system only from xfinity. once again, "20/20"'s right between the lies and matt gutman. >> reporter: the stalker of st. augustine was about to be stalked. bottle blond tawny blazejowsky

had become a dangerous loose cannon. menacing 16 people from coast to coast for seven months. all connected to her exfiancee, joe good. how would you define what tawny did to you? >> it was total harassment. >> reporter: she got him fired. humiliated, blasting his nude photo to his bosses. arrested, accusing him of beating her. investigated, claiming he ran a children's porn ring. >> i did everything i could to stay away from her. she was one step ahead of me the whole time. >> reporter: cleverly convincing the sheriff's office that joe good was bad news. >> it was disturbing. every time you see a police car drive by, "are they coming for me?" you're on pins and needles all the time. >> reporter: not content with just joe in her crosshairs, tawny was targeting his kids and even people she never met -- his co-workers, his new girlfriend, his girlfriend's landlord. when a desperate joe asked

attorney bryan shorstein for help, shorstein flinched. you were afraid that she would come after you. >> you never knew who would be the target of what it is she was doing. does anybody want to get involved with this thing? >> reporter: but he took the risk. first, convincing the sheriff's office that joe was no victimizer. he was the victim. detectives george harrigan and shannon andrews began connecting the dots. >> she had manipulated law enforcement for so long, it was time that we get to the bottom of this, and we get the real story. >> reporter: and quickly, because now, tawny was turning her venom on more children. joe good's new girlfriend mariella reported an anonymous letter, threatening her then 17-year-old daughter, erin. >> it said, "this is what erin will look like the next time mariella sees her, if she sees or even talks to joe good one more time." and attached was a picture of a mutilated body. >> reporter: what a horrific

thing to send. >> this is a death threat. >> reporter: she's taken it a step too far. >> she was the stalker at one point. but when this happened, she became the stalked. >> reporter: stalked by investigators and soon enough, unable to hide behind her lies. then a breakthrough in the case -- finding out the anonymous reports sent to law enforcement hotlines originated from tawny's computer. >> you leave an electronic trail. that all came back to her. >> reporter: it was enough evidence to get a search warrant and show up at tawny's house. >> you knocked on the door, she was home. >> yes. >> reporter: what'd she look like? >> like a mother at home with her kids. >> reporter: totally normal? >> totally normal. >> reporter: but there was nothing normal about the tidy spiral notebooks tawny kept in her bedroom. turns out while her kids were studying, tawny was scheming. this is the first notebook that you saw? >> yes. >> reporter: so you start flipping through it, and what goes through your mind? >> that i can't believe it's actually all here. >> reporter: seven notebooks.

hundreds of pages. daily notes to herself. it's explosive evidence in tawny's own schoolgirl's handwriting. a meticulous list of her many lies. every detail of her sinister plan in plain ink. reminders -- print naked pic. call self a million times. even, "get picture of decomposed corpse." dates -- march 11th, filed police report on joe. march 21th, joe arrested at work. march 28th, made report of child abuse. and once completed, each dirty deed crossed off the list and in the margins, the haunting word, done. >> i certainly did not think i would walk out of that home and have a manuscript of everything she had done and planned on doing. >> reporter: the cat had become the mouse and tawny had set her own trap. tawny was arrested that night. >> once we explained to her that she would be arrested, she wrote

a list out of things for her ex-husband to do in reference to their kids. >> reporter: she was good at lists. >> oh, she was very good at lists. >> reporter: and finally prosecutors would present a judge with another list -- tawny's lengthy catalog of crimes. >> three counts of threats for extortion, four counts of aggravated stalking, one count of false report of abuse, child neglect or abandonment. >> reporter: tawny pleaded no contest to eight felony counts. last week, the day before her sentencing, we went to tawny's house. her daughter answered the door. i wanted to know if i could speak to your mother? >> i mean, she's honestly not really available right now. >> reporter: and she would not make herself available. >> go away. no one is talking to you. >> reporter: at the courthouse the next day, we interviewed two of tawny's many victims. if she were sitting here right where i am sitting, what would you say to her?

>> she needs to know that she's not above the law. >> reporter: and suddenly we spotted tawny walking out of the courtroom. this time, nowhere to hide. maybe you want to say something to your victims? anything? do you feel any remorse? do you have anything to say to them? nothing to say? she would finally talk to the judge. the tormentor now begging for leniency. >> i am pleading with you, your honor, to please grant me forgiveness. i ask my victims for forgiveness, and for mercy, and for you to please not take me away from my children who need me. >> reporter: her lawyers argue she has obsessive compulsive disorder and is bipolar, and that those disorders contributed to her crimes. but the judge has heard enough.

>> that you be committed to the department of corrections for a period of nine years. >> reporter: nine years in prison. plus two years of house arrest and, get this, 19 years of probation. but still, for tawny's many victims, the anger and the fear are imprinted for life. joe good is forever transformed by one woman's obsession and those neat little notebooks. there were some things that were not yet crossed off. do you think if she hadn't been arrested she would have kept going? >> i'm sure she would have. >> reporter: joe good had been arrested three times for not having done anything wrong. does the department feel guilty about that? >> absolutely. it changed us forever as far as investigators. >> reporter: while he's waiting for those arrests to be expunged from his record, joe's gone from making almost six figures to doing lawn work.

if she were here right now, and you could ask her any question or tell her anything, what would you say? >> why couldn't you just let go? >> so, here's the question. what did you think about the sentence? nine years in so did you hear the new iphone is out? i'm getting one! sprint is offering this exclusive new plan with unlimited data. the plan is only $50 a month! $50? unlimited iphone! [glass shattering] so should we eat? the new sprint simply unlimited plan, exclusively for iphone 6. unlimited data, talk and text for just $50 a month. switch to sprint and we'll buy out your contract.

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