Announcer: Detective Charles sole was one of the first to respond to the Janet abaroa murder with a k9 police dog. Five years later he's made detective, and the cold case is now all his. He starts by... See More
Announcer: Detective Charles sole was one of the first to respond to the Janet abaroa murder with a k9 police dog. Five years later he's made detective, and the cold case is now all his. He starts by going over raven's version of events. I'd always go in and give Kaiden a kiss. And that's, you know, when I found out that something was wrong. Janet died that night. I wasn't there. Reporter: Now sole reaches out to raven, who is 2,000 miles away in Utah. Hey, let me call this guy and see if he wants to talk to this, you know, North Carolina detective. I kind of studied raven. I mean, he's certainly a narcissist, and I played the dumb southern cop, and he ate it up. Reporter: But raven is suspicious about the call. Watch this strange video he records after one of those nosy phone calls form detective sole. He wonders what that cop is really after. All right, we'll see you later. I don't feel too good about that. I feel myself getting frustrated. I'm not 100% sure why. You know, the more stuff I give them, the more stuff that gets leaked to any type of pending litigation. Reporter: As always, money is the first thing on raven's mind as he wonders how he might bankroll a defense. I need to win the lottery. You know, and if I were to win $3 million, I would dedicate $2 million to fighting this. Two-thirds of my winning, if you would, so -- and oh to make Janet's name more recognizable in southern Virginia. "I need to win the lottery. Oh, by the way, I would do something for Janet as well." So, come on. You know, those type of things certainly were interesting. Reporter: Sole speaks with raven several times, and his story keeps changing. The lights were on, the lights were off. The child was crying, the child wasn't crying. You don't get those things wrong if you're telling the truth. Reporter: Detective sole is also struck by what he doesn't hear in raven's ten-minute 911 call. The most important thing about that call is, not once does raven ever ask for help for his wife. Yes, and my baby's crying. You need to breathe, honey, you need to breathe. He never called for help than when people call 911, that's what they do. Reporter: Next on the detective's list, studying the crime scene photos. If Janet was killed by an intruder, as raven stated, sole would expect to see signs of a violent struggle. Nothing was disturbed in that room. A matter of fact, the blood was contained in a very small space. And you got to remember, just on the other wall is her child. So it would've been Normal for that room to be destroyed in the struggle. Reporter: The veteran detective simply doesn't buy raven's story that this was a robbery gone bad. To have someone break into your house, pass a wedding set, you know, her diamond ring. Her engagement band. The electronics, which are commonly stolen in a break-in. To go upstairs to steal a knife and a computer, it was very odd. Reporter: The missing knife from raven's beloved collection, detective sole says raven is very touchy on that subject. When I brought up the whole throwing knife thing, it always was like a dentist poking at a tooth that's bad. He became frustrated with me like, why do you care about this? Well, it's kind of important. Your wife was stabbed to death. Reporter: Knowing police are desperate to find the murder weapon, raven records another strange video, which police will later find. That's raven's hand, caressing the blade. All right, this is a knife that has been in my possession since I got my stuff back from when my brother and dad moved out of my house for me after Janet passed away. Reporter: Raven says the knife was in his office at the time of Janet's murder, but that it was overlooked by crime scene investigators, a story detective sole finds highly unlikely. You gotta remember, we're talking about less than a 10 by 10 room. So for a knife that's that big and you're there cleaning up a room where there was a murder, a stabbing, you're going to overlook a knife? It's a throwing knife. I'm going to be mailing this so that he can give it to detectives. Reporter: Is raven taunting detectives? Could this be the murder weapon? It just kind of was bizarre that, you know, he would all the sudden mail a knife that would be consistent with the wound that she received. Reporter: One more thing nagging at sole. Remember raven told police Janet was getting ready to go to bed when he left the night of her murder. So detective sole is struck by one crime scene photo in particular. The statement of "My wife was ready to go to bed, you know, when I left." Well, when you look through the crime scene photos, the first thing I'm looking at is, well, her contact lens case is open. Reporter: Sole learns from Janet's family that she would always take her lens out at night. If Janet was wearing her contacts when she died, that suggests raven may have been lying about her going to bed before he left. I said to myself, "Well, if she's ready to go bed, you know, and she still has her contacts in, you know, that's unusual." Reporter: If that hunch is right, it could blow a hole in raven's alibi. Detective sole decides to take a drastic step. The only way to support it would be to physically check her eyes. Because, you know, the m.e.'s report didn't denote contact lens being present when they did her autopsy here in North Carolina. The body of Janet abaroa is being exhumed tonight. It's hard because she was being dug up and then, okay, she was already murdered. Now she can't even rest after she's dead. But I understood why, and I knew the importance of it. Reporter: In an age of csi and DNA, authorities go to work in a peaceful Pennsylvania cemetery with the bluntest investigative tool of all, a backhoe. It was a necessary part of the process, but it was, it was horrible to see the family have what he was lookinwas okinwa would this be the piece of evidence to filly answer the question, who killed Janet abaroa? Announcer: Stay with us as a
This transcript has been automatically generated and may not be 100% accurate.