Archeologist Marita Genesis and anthropologist Sabine Birkenbeil inspect the skull of a man executed in the 13th century: Researchers found the remains of 70 people at an execution site not far from the eastern German city of Erfurt. They are now undergoing an anthropological evaluation. One of the dead was tied up, another lay next to an iron strangulation chain. A third had been buried along with a sharp blade. "It could be the murder weapon," says Genesis.