emotional day at the so-called breakup murder trial yesterday. Jodi arias, repeatedly breaking down in tears, as the prosecutor grilled her on the night that she killed her ex-boyfriend, travis... See More
emotional day at the so-called breakup murder trial yesterday. Jodi arias, repeatedly breaking down in tears, as the prosecutor grilled her on the night that she killed her ex-boyfriend, travis alexander. It was her 13th day on the stand. And really could have been the most pivotal of all. Abc's ryan owens has the latest. Reporter: Jodi arias finally caved under the pressure. Ma'am, were you crying when you were shooting him? I don't remember. Were you crying when you were stabbing him? I don't remember. Reporter: On day five of juan martinez's withering cross-examination. Would you like to look at the photograph? No. Reporter: She broke down when he told her to look at the gruesome crime scene she created. Stabbing and killing her ex-boyfriend, travis alexander. Would you also agree you are the individual that stabbed him in the upper torso? Yes. claimed she killed alexander in self-defense in june of 2008, when the mormon businessman threatened her life. The prosecutor made arias act out the way she says he lunged at her. Show me the linebacker pose. Reporter: Martinez believes arias is a cold-blooded killer who made up the fight and abuse allegations to justify her bloody rampage. She also did a lot to cover her tracks. Like leaving this voicemail for a man she just killed. But let me know. And I'll talk to you soon. There would be no other reason to leave a dead man a telephone call, would there? Ultimately, that was the main reason, yes. Reporter: She also wrote this e-mail to him three days after the crime. Hey, you. I haven't heard back from you. I hope you're not still upset i didn't come to see you. Reporter: Martinez ended by showing this clip from the show "inside edition." You can mark my words on that one, no jury will convict me. And you believed that no jury would convict you because you were going to lie your way out of it, right? Objection. Argumentative. Reporter: Next week, arias will be back on the stand, under friendlier questioning by her attorney. He has a lot of work to do. His client could face the death penalty. For "good morning america," ryan owens, abc news, phoenix.
This transcript has been automatically generated and may not be 100% accurate.