the jodi arias trial. The prosecutor calls her a liar in court bringing up those interrogation tapes where her own father says she's been lying to her parents for years and ryan owens in phoenix with... See More
the jodi arias trial. The prosecutor calls her a liar in court bringing up those interrogation tapes where her own father says she's been lying to her parents for years and ryan owens in phoenix with the latest. Good morning, ryan. Reporter: Good morning to you, george. With the possible exception of jodi arias herself no witness is more important to her defense claim than the domestic violence claim on the stand right now and you can bet the prosecutor knows it. If she is manipulative to men you would agree that travis alexander was a man, right? I said she was -- Reporter: Another day of verbal combat between the feisty prosecutor and the defense psychotherapist who claims jodi arias was a victim of domestic violence at the hands of her ex-boyfriend, travis alexander. You didn't talk to mr. Sandri, mr. San mr. Alexander, did you no. No, I did not. Only person you talked to was the defendant? Correct. Reporter: She could face the death penalty if she's convicted of repeatedly shooting and stabbing him in 2008. The 32-year-old admits to killing the mormon businessman but says it was self-defense. The prosecutor said she invented the violence and even arias' own father knows she's a liar as he said in this interrogation tape after his daughter was arrested. She's never been honest with us since then and she was, um, 14 then. Reporter: The judge allowed questions about it. Don't you think that his view of her truthfulness has a much better basis than yours? He has a much longer history with her. Reporter: The prosecutor's strategy of portraying the expert as gullible worked with arias' last witness and shredded the credibility of dr. Samuels who diagnosed her with ptsd. But a male prosecutor verbally attacking a female witness who spent her life helping domestic violence victims is risky business as martinez found out. If you were in my group i would ask you to take a time-out, mr. Martz. Reporter: This witness on the stand for a solid week. She will be back there this morning and later this week, we expect she will finally get to those questions from the jury and, elizabeth, we talked about this before, so fascinating to watch these jurors scribbling on pieces of paper as she testifying then passing them and putting them in the basket. Whole pile of them waiting for her. I was in the court last week. They are paying very close attention, those jurors. Reporter: They are. Should be interesting. Thanks so much.
This transcript has been automatically generated and may not be 100% accurate.