Domestic Violence Expert Testifies in Arias Trial A domestic violence expert is testifying in the trial of a woman accused of murdering her former boyfriend in his suburban Phoenix home. The expert resumes testimony Tuesday after detailing her expertise to jurors on Monday. FILE - In this March 7, 2013 file photo, Jodi Arias answers written questions from the jury in Maricopa County Superior Court in Phoenix during her trial for the 2008 killing of her boyfriend, Travis Alexander. Psychologist Richard Samuels, who diagnosed Arias with post-traumatic stress disorder and amnesia, returns to the witness stand for a sixth day of testimony Monday, March 25, 2013. (AP Photo/The Arizona Republic, Tom Tingle, Pool, File) Close A psychologist who diagnosed Arias with post-traumatic stress disorder and amnesia concluded nearly six days of testimony on Monday. The prosecutor questioned his credibility and accused him of forming a relationship with Arias that biased his diagnosis. Psychologist Richard Samuels denied the accusations. He says he based his diagnosis on 35 years of experience and multiple tests. Arias faces a possible death sentence if convicted of first-degree murder in the 2008 killing of Travis Alexander. Arias first denied any involvement, then said it was self-defense.