But first, we have the latest on the murder trial in georgia. The defendant, a convicted stalker, acting as his own lawyer. He was sentenced to life in prison on monday. This morning, we sit down with... See More
But first, we have the latest on the murder trial in georgia. The defendant, a convicted stalker, acting as his own lawyer. He was sentenced to life in prison on monday. This morning, we sit down with his victims for the first time. They sat down with "20/20" anchor, chris cuomo. Chris has that. Reporter: Thank you, george. This trial came down to the ability of two people to face down the man who ruined their liv lives. A courtroom became a crucible of fears of the fast and to be rid of a monster. After 17 years, waseem daker's victims say justice prevailed after four hours to send him to prison for a life sentence and 47 years for the murder of flight attendant karmen smith and the stabbing of her son, nicholas. Who survived to take the stand. Do you remember telling them in 1995 that the eyes were blue. I had gotten stabbed by you. So, I don't really think that that was a very good time to be asking a 5-year-old questions like that. Reporter: In a bizarre twist, nick smith was face-to-face with his attacker, as daker represented himself in court. Staring at the man who stabbed him 18 times, smith decided to stand his ground. What did you want him to know? That he didn't break me. That he might have tried to ruin my life. But he didn't. Reporter: Daker is believed to have attacked smith and killed his mother, karmen, as revenge against the woman he stalked, she, too, had to confront the man who haunted her dreams. This is unappropriate. It's really inappropriate that you stalk me and harassment and you're sitting here asking me questions. And I have to come back and answer you. That's hard for me. Reporter: At trial, you had done something very brave. You had come out and facing almost the ultimate fear. Yes. Reporter: You did not want to be shown. No. Reporter: Why? This is clearly something i had held in for so long, that only a few close, dear friends are aware of what I experienced through the hands of waseem daker. The poor guy had to confront the man who stabbed him 18 times. If he's going to do it, I have to be strong for him. To show him, we can do it. Reporter: Dna evidence tied daker to the crime scene. And the strength of his former victims made the jury see him for what they said he was, a killer, who will hurt these people no more. No longer will someone other than me control my life and interrupt my thoughts. Reporter: How do you feel different in the quiet moments? I can sleep a lot easier than I used to. And I just feel more free than i did before. Reporter: You took the power back. Yes, I did. He has no power over me. Reporter: Imagine how hard it was to get to that point, george. This was the boogieman to this man and this woman. Probably one of the reasons he acted as his own lawyer. But that didn't help him. Probably not in this case. He knew he had them in the grip of fear. He knew he might intimidate them. He was wrong, as you'll see when we do the story. Special edition of "20/20" on friday. Be sure to watch, george.
This transcript has been automatically generated and may not be 100% accurate.