Transcript for Jodi Arias Death Penalty Trial Begins With New Defense Strategy
when and where that is. We are going to get back with Jodi Arias back in court. The death or life in prison. Ryan Owens is in Phoenix, on the case from the start. Good morning, Ryan. Reporter: Hey, George, good morning to you. This new jury hearing about the same old Jodi Arias. How she murdered her boyfriend and then lied all about it. But if you think her defense team can't come up with something new, think again. Convicted killer Jodi Arias has a new look. Her demur dark hair is shorter. And also new, the strategy to save her life. At least twice in opening statements Tuesday, her attorney kaurled her a troubled, mentally ill young woman. That's quite a change from she told the first jury, she was a battered woman forced to kill Travis Alexander after a fight in 2008. He attacked me and I defended myself. Reporter: But the first jury didn't buy it and convicted her of first-degree murder. This retrial is only about whether the 34-year-old should die or spend the rest of her life in prison. Fiery prosecutor Juan Martinez wants her on death row. And he started the argument documenting what he called a slaughter. A successful Mormon businessman shot and repeatedly stabbed as he showers at the hands of his ex-girlfriend. 18 jurors, 12 plus 6 alternates. Overwhelmingly female, many are young. Close to the same age as the woman they now must decide lives or dies. A decision her first jury deadlocked on last year. If you were on that jury and you had heard what they have heard, would you kill you? I don't believe in capital punishment. So the answer would be no. Reporter: So later today the medical examiner will be on the stand. And more from the lead detective. George, you almost have to feel sorry for this brand new jury. It's only day two, and they have gruesome crime seen photos, autopsy photos and sexually explicit photos. So much for easing into the case. That's true. And a clear strategy, putting the evidence out there right away. It's clear. The prosecution saying this was an incredibly cruel and heinous crime. That's the most important thing. The defense saying she's mentally ill, remorseful, never committed a crime before. They have to balance the aggravating circumstances with the mitigating circumstances. What does that mean? They have to make a gut call on do they want to give Jodi Arias the death penalty? That's not an easy place for prosecutors to be. Because they have to get all 12 of them to agree to sentence her to death. Something that last jury did not do. I have never heard of a retrial on sentencing. Only in two states where you can retry the death penalty phase much a case. Arizona is one of those states. This is an unusual thing to do this. They didn't have to. I've said this publicly before. I think they should have and cut a deal to give her life in prison and end it. But the family of Travis Alexander wants that, and the prosecutor wants the new trial. In the end, it's up to the prosecutor to move forward. And this jury deciding one thing only, does she get the death penalty? That's it. And if they can't agree on death, it's over. Life with parole or life without parole, but no retrial if this jury hangs. And that's up to the judge, parole or no parole. Very odd. Now to dangers at the atm.
This transcript has been automatically generated and may not be 100% accurate.