The Federal Bureau of Investigation (FBI) identified Abraham Telvi as the assailant in August 1956, but Telvi had been murdered on July 28, 1956, by mobsters for demanding an additional $50,000 on top of the $500 he had already received for the crime. On August 29, 1956, Genovese crime family underboss Johnny Dio was arrested for conspiracy in the Riesel attack, pleaded not guilty, and was released on $100,000 bond even though prosecutors later publicly linked him to the Telvi murder.