Article Photos: Arias defense tries to discredit state witness 5/11

Prosecutor Juan Martinez looks on during the cross examination of  Dr. Janeen DeMarte during the Jodi Arias trial at Maricopa County Superior Court in Phoenix on Wednesday, April 17, 2013.   Arias is on trial for the killing of her boyfriend, Travis Alexander in 2008.  Arias claims self-defense but faces a potential death sentence if convicted of first-degree murder.  (AP Photo/The Arizona Republic, David Wallace, Pool)