On March 20, 1911, the body of 13-year-old Andrei Yuschinski was found in a cave outside Kiev, Ukraine, eight days after the boy disappeared on the way to school. His murder was the impetus for the blood-libel accusation and trial of Menachem Mendel Beilis, as part of an anti-Jewish conspiracy that apparently was directed from the highest levels of czarist Russia, and that engaged the attention of the...