Let's get to therial of an arizona woman who has been charged with brutally killing her boyfriend after he tried to break up with her. She stabbed him, get this, 27 times allegedly. And shot him, as... See More
Let's get to therial of an arizona woman who has been charged with brutally killing her boyfriend after he tried to break up with her. She stabbed him, get this, 27 times allegedly. And shot him, as well, allegedly. And jodi arias could now be facing the death penalty. Dan and nancy are waiting to weigh in. But here's ryan owens with the background. ♪ Oh, holy night ♪ Reporter: That attractive woman singing christmas carols behind bars could soon be on death row. Prosecutors will argue that 32-year-old jodi arias, should die for the one-time murder of her one-time boyfriend, travis alexander. She may sound soft-spoken. But police say she stabbed alexander 27 s, slit his throat, and shot him in the head at his arizona home, in 2008. Arias has pled not guilty. The two met at a work conference six years ago. Jodi says they fell in love, traveled the country together. And to strengthen her ties to the devout mormon, she even converted. But travis' friends say, after dating a few months, she tried to break it off. And told them this. There is nothing about her that I see marriage material or wife material. But it's hard to say no to a woman that sneaks into your house, crawls in your bed and tries to, you know, seduce you. Reporter: Travis' family and friends say jodi was stalking him in the months before the murder, something she denies. But at first, she denied being at his house at the night before the murder then, police found a camera in travis' washing machine. It had pictures of the two having sex. And pictures of travis after she was killed. Faced with that, jodi told the show, "inside edition," she was there, but didn't do it. I witnessed travis being attacked by two other individuals. Who? I don't know who they were. I couldn't pick them out in a killer is singing a new tune. ♪ Of hope ♪ Reporter: She admits she did kill him, but in self-defense. She claims he was sexually and physically abusive throughout their relationship. It makes me sick because i know her true side. And I ask people to please not buy into this sweet, innocent, you know, personality that she puts on. No jury is going to convict me. Why not? Because I'm innocent. And you can mark my words on that one. No jury will convict me. Reporter: For "good morning america," ryan owens, abc news, dallas. For more, we're joined by "gma" legal analyst, dan abrams. And nancy grace will cover the trial tonight on her hln show. It looks tough. Three different stories from jodi ha jodi arias. She wasn't there. She was there, but other people did it. She did it but it was self-defense. When a witness begins to change their story, that's the kiss of death, pardon the pun. And another problem for her at trial, is she may want to insist on taking the stand against her attorney's advice. Remember, you're talking about the winner of "american idol" behind bars. And that may be the shot you're showing right now. It is. She loves the limelight. And all this business about them being broken up. They weren't broken up. They were having sex right before the murder. And with her changing stories, she also said she killed m in self-defense. That's three different stories she told police. How do you begin to defend her? I think in the end, the self-defense claim is an effort to get second-degree murder. I think they know they're in big trouble here. She is now, by arguing self-defense, effectively admitting that she did this, right? She's not saying, I wasn't there. She's not saying there were intruders. She is saying, I did it. I think this is an effort by her to say, you're not going to be able to prove premeditation. It happened in the heat of passion. We had a stormy relationship. And there's a big difference between second-degree murder and first-degree murder. They don't need premeditation. They also charged her with felony murder, which simply means the death occurs during the commission of a felony. Here, they're saying the felony is burglary. Which means you enter a structure with the intent to commit a crime. She went into the home with a gun. Listen -- he was shot. He was stabbed. He was beaten. Boom. But those are two different legal theories that are requiring the same idea, which is she went in there with the intent to do something. And they're going to argue, with this second-degree murder, i think, that she didn't go i there with the intent to commit any kind of crime. She went in with a gun. I heard a lot about crazy sex. But when you introduce a gun into the scenario, that's little too crazy, even for a jury. Do you think the prosecution's overreaching by going for the first-degree? I think the prosecutors are overreaching going for the death penalty. That may be funny to you. But that's not funny to me. -- Took pictures of him dead in the shower okay? There's no question -- this is a legal matter. One question -- there's no question it is a legal matter. They can pursue the death penalty. They have theory here, which is not out of bounds about why the death penalty applies. The death penalty should be the worst of the worst. This is a domestic violence case. She ought to be charged with murder. She ought not to be charged with the death penalty. Because that was her boyfriend, that makes it less valuable? She stabbed him 27 times. And she took pictures of him, dead, naked, in theshower. She took her own crime scene photos, for pete sake. There was blood all the way down the stairwell. That's why she is charged with murder. This is a classic, death penalty case. You're passionate over this. Hold on. Does she take the stand or not? I think she's going to argue self-defense, she has to take the stand. But I can't see how she does. I think, if they're serious about a self-defense claim, she's going to have to take the stand. We'll have you both back on this. Nancy covers it tonight. Time for the weather.
This transcript has been automatically generated and may not be 100% accurate.