 At 3 a.m. on April 5, 1956, an unknown assailant threw a vial of acid into Riesel's face as he left a late-night interview at Lindy's, an attack which left the journalist permanently blind.The 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, Dioguardi 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.