traumatic day in the so-called breakup murder trial. Jodi arias going head-to-head for a third day of cross-examination. The prosecutor attacking her memory. Arias, fighting back. Ryan owens has the story. Reporter: Another day of sparring. Do you have a problem understanding what's going on? Sometimes because you go in circles. Reporter: Jodi arias is going toe-to-toe with prosecutor juan martinez, for the third-straight day of cross-examination. How is it that it just happens that you can't remember what you said. I think I'm more focused on your posture and your tone and your anger. Reporter: Arias admits she shot travis alexander in june of 2008, but claims it was self-defense. She testified she remembers very little about actually committing the crime. The answer, yes or no? Do you remember? Remember what? Reporter: The prosecutor said she murdered her former lover in cold blood. And concocted a story of abuse to beat the death penalty. She spent nine days crying on the stand, claiming alexander was a sexual dieviant who beat her. But they showed arias this note at the memorial service. It says, travis, you're beautiful on the inside and out. Doesn't it? Isn't that kind of a lie based on what you told us in court today? Reporter: He showed us this interview with the news magazine "48 hours." He brightened room when he walked in. The world is a darker place without him in it anymore. Reporter: She is talk about a man she claims buzed her so severely, she had no choice but to kill him. How is it that you're not remembering what you're saying? Because you're making my brain scramble. Reporter: Court was cut an hour short tuesday, after arias said she had a headache. The questions will not get any easier when cross-examination resumes in a few hours.