Christine Mirzayan was the last known victim of the Potomac River Rapist. On the evening of August 1, 1998, the 29-year-old had walked to a friend’s cookout in the Georgetown area of Washington, D.C. Recently married, Mirzayan had come to Washington from San Francisco for an internship at the National Academy of Sciences and was living in student housing at Georgetown University.

When the cookout was over, a group of her friends decided to go out dancing, but Mirzayan declined because she was recovering from the flu. She started to walk home by herself, but she never made it. On her way, she was raped and repeatedly bludgeoned with a 73-pound rock.

Two witnesses later told police they had seen Mirzayan walking along a dark stretch of road with a man following her. The witnesses helped police create a sketch of that individual—which has since been age-enhanced—and he is being sought in connection with the case.