Woman's affair turns into nightmare of cyber-stalking: Part 1

Police were called to Courtney and her husband's home to investigate charges of child abuse and threatening calls, emails and text messages.
9:47 | 03/09/18

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Transcript for Woman's affair turns into nightmare of cyber-stalking: Part 1
accuses of trying to ruin her life. S. Saturday 4:05 A.M. 1:02 A.M. I will get you no matter what I do. In our connected era, Courtney Allen provides brutal cautionary tale. He targeted our home. He targeted our neighbors. He tried to get us fired. This wife and mother from suburban Seattle says what started as an online flirtation led to a dogged die a bolical campaign of cyber stalking. I was having nightmares my husband was dead and my son taken from me. She said online chat room hurdled videos sent to her colleagues and police sent to her home to investigate child abuse and voice mails and e-mails and text. You don't can think you can run from this You created. This is the man Courtney and her husband blame. Todd zonis a 45-year-old from Arizona. I don't know why you hate me so much. I'm afraid of what he will do. If I kill myself maybe that will be the end. This is a story of public humiliatation and private torment. I introduce this maniac into the lives of my family and it's all my fault. All of it is my fault. The story begins in suburban Seattle. Courtney Allen was a married stay-at-home mother. That's when her marriage began to change. Steve wasn't home a lot. I felt abandoned. And having no time to talk to friends I felt very sec ludsed. Start to play a online game before players use the power of the gods to protect themselves and fourth alliances with other virtual players. While playing the game med Todd zoneis. At first what was it like. He was rude and crude but I thought it was funny. Then they began emayling. Did the relationship get close. Yes we started flirting and turned to texting, sexting and that's mainly how the relationship started to evolve. Courtney was living a double life. A married woman with a child having what she calls a secret online affair. Even though you never head him face to face, you felt like you knew him? Yes I felt he was my best friend. Told him very private things about myself. Things I really didn't tell other people. He replaced my husband. Then she says things turned sexual. He had an idea we should exchange elicit videos and he sent me several and asked for one in return and I obliged. So you must have trusted him. I did impolicedly. It's a big risk I can see you wish you hadn't taken. Yes. In September 2013 her husband Steven discovered the relationship. It was devastated. Wouldn't think your spouse would do that. She agreed to end the affair. But instead she hid her relationship in a password-protected tablet. Did you feel guilty? Yes. Months later he caught her again. Disappointed and decided to do something drastic. I found a website marriage builder. Says you must expose the affair to family, friends and especially the lover he's spouse and advantages of exposure far out weigh the disadvantages, saying this was part of the complete plan for marital reckon ill iation. What did you do at that point? I told my parents what was going on and sent individual Facebook messages to our common friends. How did you react? I was not happy. I was furious. But Steven took it even further e-mailing Todd's wife and parents. He is having an internet affair with my wife involving text, e-mails and shared recorded videos of mast urbanation. Were you at all worried about what kind of blow back you would receive. Never imagined. According to the Allen's they poked a hornets nest. Todd had become furious. He focused on my husband. Steve's bosses started seeing anonymous e-mails. Saying lies about me to get me fired. And sent a death threat to Steven's grandmother. He threatened to burn down the house with her in it. The next was an all-out attack on our family. Where are you? Are you okay? Are you hoping I fade away so you can enjoy twisting the night? Followed by more at 9:30. 9:42. 10:00. I was grasping at straws how to get rid of him to leave me alone. Then five more e-mails -- they would continue like this, angry and abusive. I'm coming up there. I hate you and hope you get what's coming to you. I did nothing wrong I'm not going anywhere. Then came the voice mails. There's no job either of you could have that I won't know about and won't be there. Steven started getting so much harassment he had to quit his job. Did you ever feel recesentful that she created this problem. I always knew it was him. He could have chosen not to do it. One morning she received more than 200 text messages. Like a switch was flipped like he had gone crazy. Then this video. I don't know why you hate me so much. Seriously I never been more serious about anything in my life. I mean, I just want to know how you are. What you're feeling. What you're thinking. What you are doing. I truly care. I don't know how I hurt you. I never meant to. But the cyber torture would get worse the video of Courtney mast you are baiting was posted and sent to bosses and friends. According to evidence the Facebook profile used to send that video was accessed from his ip draesz. Address. They decided it was time to call the police. The police said I don't know what to do for you I never seen harassment as bad as this. This is what you heard from the cops, nothing they could do. Police officer told us because he was in Arizona our hands are tied. Stalking is staulking whether through kpulter phone or in person. Certainly this offender broke many, many laws. Who do we go to when you're a victim of a crime, it's the police. There should be obligation for law enforcement officers to actually enforce the laws we have. So the 07ballens were relieved few days later. Detective said you have been reported for child abuse. I'm terrified thinking my son's going to be taken away from me. At that point I'm like we've got a stalker and I think this is his doing. He told me something was going to happen and this is it. The Allen's finally went to the FBI. An agent took their case now the death threats were rolling in. One saying you and Steven are garbage and he's going do die. Was the FBI ever able to do anything to protect you? They said well be prepared to protect yourself. That's what they told you? That's what they told me. You had documented death threats from a traceable e-mail account right? They were not all traceable. Because whoever was harassing them had been using tore, a program making identifying the sender impossible. After months of brutal harassment Courtney says she was considering taking her own life. So I got an e-mail that said better for you if you just die. If you just kill yourself. And all of this guilt came crashing down. If I kill myself maybe that will be the end, maybe he'll stop. The Allen's finally decided to take him to court but their case would be difficult one to prove. How do you prosecute if someone's done such a good job covering their tracks? In a case like this where there's just non-stop harassment. They always mess up. Coming up next we go face to face with the man the Allen's say turned their life into a living hell. She describes your relationship as more emotional, romantic. Yeah. Is that true? No it's not true at all. Todd says some of the e-mails accessed from his ip address and calls to police were done by Courtney anticipation husband Steven pretending to be him. The voice is me but not done when they said it was. When we come back we'll have the rest of this surprising

This transcript has been automatically generated and may not be 100% accurate.

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