Convicted killer Jodi Arias, who could face the death penalty for the murder of her ex-boyfriend at his Phoenix area home more than six years ago, won a three-week delay on Wednesday in the retrial of the penalty phase of the case. Maricopa County Superior Court Judge Sherry Stephens granted a request by Arias, who is acting as her own attorney in the penalty phase retrial, to push back jury selection until Sept. 29, according to a court spokeswoman. Arias, 34, asked for the delay from Sept. 8 because of problems meeting with a potential witness, the spokeswoman said. The judge’s decision came after a closed-door hearing on Wednesday morning and was announced later by the court. A state jury convicted Arias in May 2013 of killing Travis Alexander in a headline-grabbing case that was broadcast live on the Internet and attracted thousands of avid trial watchers nationwide.