'Happy Face Killer' Describes Killing First Victim

Part 2: Keith Jesperson met his first victim Taunja Bennett at a bar and lured her back to his home.
6:40 | 07/11/15

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Transcript for 'Happy Face Killer' Describes Killing First Victim
You have a lot of fond memories of your dad here. Right, I do. Reporter: After Melissa Moore's parents got divorced, her dad -- that long-haul trucker -- still made an effort to visit. Summer meant precious time together. You know, I was amazed that over your lifetime how often he wanted to come to see you I mean, he wanted to be a dad. He really did. Reporter: Keith Jesperson grew up in british Columbia, Canada, the middle child of five. He had always loved camping and the outdoors. Later, when he would take his own children to Oregon's multnomah falls. Melissa says it brought out the kid in him. He'd swim right in here and he'd go under the waterfall. And he would just, just have fun, laughing and like nobody was around. Reporter: But back on the road conversations sometimes veered to the grotesque, which Melissa wrote off as fantasy. One time, as we're driving up the old scenic highway, my father said, I know how to kill someone and get away with it. So I thought maybe the detective magazines or something he's really into, the forensics and crime -- maybe he's -- he's into that. Reporter: Though she had no idea at the time, it turns out what he was talking about was an actual murder, one he had just committed. The same route that we would take going to the Oregon coast is where he disposed the first victim. It's just this way, over that direction. Reporter: Melissa's dad, Keith hunter Jesperson, is currently serving three life sentences in Oregon's state penitentiary. Prison officials will not allow Jesperson to conduct face to face interviews, because they say he relishes the attention too much. But we did speak with him numerous times, by phone, in 2010. What happened with the first murder? I picked up a woman at a bar, took her home. Reporter: The conversations, extremely candid with disturbing details. A killer in his own words tells us how and why he committed the first of his grisly murders in January, 1990. The very same year his divorce to Melissa's mom was finalized. We were drinking beer a lot that day. Reporter: The woman he met in a Portland area bar was a 23-year-old named taunja Bennett, described by family as overtly friendly and developmentally slow. I took her home. I thought I was going to get lucky. Reporter: After a night of heavy drinking, the two left the bar and headed back to Jesperson's suburban red brick home where he lured her and attempted to have sex. Comments were made and different things, and, and, uh, an altercation happened, and I struck her. I actually had hit her in the face, and, for some reason, I just kept on hitting her in the face and because of that, I feared going to prison for slugging her in the face and causing bodily injury, and so I killed her. Reporter: You meant to kill her. Oh, yes I did. I meant to kill her, to cover up the assault. Reporter: You say it very matter-of-factly. With no remorse or hint of remorse. Matter of fact because that's what it is. Reporter: After strangling Bennett with his bare hands, Jesperson left her lifeless body behind and returned to the bar to coldly continue drinking and establish an alibi. He then drove the body up the old scenic highway and dumped it in the dense brush just miles from where he and his children liked to frolic in the waterfalls. And I put the body up there in the Columbia river gorge, uh, had tied a rope around its neck mostly to -- I didn't know how the body reacted when you start moving it. Reporter: Days later, Bennett's body was discovered. But Jesperson would not become a suspect and this is where the story takes a strange turn. Out of the blue, a total stranger comes forward to take credit for the crime with a bizarre false confession. This woman tries to frame her abusive boyfriend, telling police he murdered taunja Benett using details of the crime from newspaper reports. Detective Rick Buckner investigated the case. She actually went so far as to buy a purse and put it in the trunk of John's car claiming it was taunja Bennett's. Reporter: Having incriminated herself, she now faced prison for something she had nothing to do with. We had people in custody for a crime they didn't commit. Reporter: Meanwhile, the real killer is frustrated and envious of all the attention the pair is receiving for his crime. I was puzzled. I'd say I was, it was, it was something that just caught me kind of like off guard. Especially when I heard that one had confessed to it. Reporter: So, back on the road, in a rest stop bathroom he scribbles on the wall. "January 21, 1990. I killed taunja Benett in Portland. Two people got the blame so I can kill again." And he did. Two years later, he embarked on a killing spree. What about Lori Ann Pentland? Yes. I did kill her, yeah. Her, her attitude was like her life was all hell and she didn't want to be around and she wanted me to feel sorry for her and I just, well, I can kill you and put you out of your misery and she said, "Go for it," so I did. Reporter: She asked you to kill her? Well, I, I told her that, you know, if your life's so bad, why don't you just end it? Reporter: He recounts the details of his crimes with a chilling lack of emotion. There was Cynthia rose -- you killed her over a parking spot? Yes, I did. It was supposed to be a parking spot. Reporter: Number five and six were "Jane does." In 1995, number seven -- Angela sebreze. Killing her, it seems, wasn't enough. Is she the victim that you tied under the truck? Yes, she is, yeah. Reporter: Why did you do that? I felt that by dragging her under the truck that I would destroy all evidence of who her identity was. Reporter: Did you choke all of the women? Yes I did, yeah. Reporter: Why did you choke them? Well, that was what I had done with the first one, so I never changed. It'd worked the first time, so I went to the second and third, fourth, and fifth, sixth, and seventh. Reporter: It's so gruesome what you're describing. I mean, there's a possibility that these people's family members might be listening to you describing this. I'm sorry it happened, wish it never happened, and can we move on? Reporter: Can we move on? Yeah, I mean, come on, I mean, it's done, it's over with. Reporter: How would you feel if somebody did this to your daughter? Well, I would probably search him down and kill him. Yes, I'd like to go back in time and change it and make it all go away and make it all peaches and cream again, but I can't do that. At the time, I could justify each and every one of those murders, and at this time, I cannot. Reporter: Coming up --

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

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