Who was attacked by the brother of a victim of the Saint Valentine's Day massacre?
Peter Gusenberg:  Peter Gusenberg participated in an infamous attack on Al Capone during a vicious gang war. Frank Gusenberg: Frank Gusenberg (October 11, 1893 – February 14, 1929) was a German-American contract killer and a victim of the Saint Valentine's Day massacre in Chicago, Illinois.
i don't know