Andrei Yushchinsky (1898-March 12? 1911 O.S.), alternatively: Yustshinsky, Yuschinski, etc. was a Ukrainian boy whose death set off ritual murder accusations against Menahem Mendel Beilis, followed by a trial (known as the "Beilis Trial" or "Beilis Affair") that sparked international criticism of the antisemitic policies of the Russian Empire. On March 12, 1911, Yushchinsky disappeared on his way to school. Wikipedia
The definitive Wikipedia entry for Andrei Yushchinsky. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Andrei_Yushchinsky