From Rocklopedia Fakebandica
Gotha Shumangruber, and eager to conduct his new concerto and get rich. Then his twin brother Luigi shows up straight off the boat from Italy to confront him about stealing HIS concerto. "Tony" acts contrite, and agrees to secretly switch places so that Luigi will be the one to conduct that night. But then Luigi-as-Antonio is poisoned in the middle of the concert, and news photographer Honey Blake (aka Blonde Bomber) and her comic relief assistant Jimmy Slapso have to solve the case.
From the "Concerto of Death" story of Harvey comic book Green Hornet Comics #33 (March-April 1947).