Cicci never testified to any of the charges against Michael--all he said was that he was a member of the Corleone crime family; that Michael was the head of the family; that he was a button who killed on orders--and that he never spoke to Michael. It's all in the transcript. The specific charges that Michael was asked about probably were fed to the subcommittee by Roth, through Questadt.

BUT: Cicci damaged Michael by testifying that he was the head of a crime family. And, unlike Frankie, he didn't recant his testimony. Since he said he never got a direct order from Michael, he was of no further use to the government. There was no Witness Protection Program then, and the government had no need to provide him with extra protection like they gave Frankie (IMO, they probably thought Frankie would eventually give them something they could use against Michael). Would Michael give Cicci a pass because he said he never got a direct order--or would he have Cicci whacked in prison for betraying him?