S14, E18: Leah Glaser is found beaten to death in her apartment. It looks as if someone forced their way in, and then attacked her, but Briscoe and Green can't tell what's missing. They try to figure out who would have access to her apartment and find an ambulance driver who, they suspect, had a senior citizen robbery ring with his co-workers. But both drivers had alibis for the time of the murder. The driver dropped Leah off at the Federal Building and it's revealed she was a witness in the deportation trial of Stefan Anders, a Nazi. Leah was a slave laborer at Bobrek, a satellite camp of Auschwitz, which manufactured airplane and submarine parts and was in the process of giving her version of events as part of the Shoah project. She also picked him out of a lineup and Anders' visa photo matched his SS photo. Also, they see he has Leah's prized possession, a locket, which he claims he didn't take from her, but that someone sent it to him anonymously.