Police determined that DiGiovanni was killed during an exchange of lead with Joseph Morici, later found recovering from his own serious gunshot wound and arrested. Morici was said to be a native of the Castelbuono-Termini area of Sicily. Police heard that he was president of an organization known as "the Sicilian Society." He eventually admitted firing the shot that took DiGiovanni's life but claimed he did so in self-defense. A grand jury refused to indict him for murder.
"Chicago gangland hit (long before Capone)" on Writers of Wrongs:
https://www.writersofwrongs.com/2017/02 ... apone.html