Sara (surname unknown) is a serial assailant of homeless people assisted by her boyfriend Seth, out of a projected "vengeance" after her father was killed on the subway by an abrasive homeless man and developed a prejudice against vagrants.
The duo were the original prime suspects in the castration and fatal arson of Josh Gatti, a homeless high school alumnus diagnosed with schizophrenia. In a sting using John Munch as bait, the both of them were arrested after assaulting him. They were ultimately cleared of wrongdoing, as Alec Bernardi killed him for impregnating his sister, Tina, out of her own consent in a school pregnancy pact.
Sara and Seth were found guilty on multiple assault and hate crime charges and imprisoned. (SVU: "Babes")