They didn't subpoena Rocco or Neri, either.
I think the subcommittee's strategy was to focus on Michael--make him relaxed so that he'd perjure himself. Subpoenaing everyone around him would put all of them in a siege mentality--they'd all take the Fifth, including Michael.


Ntra la porta tua lu sangu � sparsu,
E nun me mporta si ce muoru accisu...
E s'iddu muoru e vaju mparadisu
Si nun ce truovo a ttia, mancu ce trasu.