Leo Stein

In the short stories Poirot and the Regatta Mystery and the Parker Pyne short story The Regatta Mystery, Leo Stein is a Hatton Garden diamond merchant and partner of Isaac Pointz.

Leo was a member of Isaac Pointz's yachting party at Dartmouth. He attended the dinner at the Royal George Hotel during which the Pointz's diamond, “the Morning Star” went missing.