Angelo LaPietra and Joe Ferriola were two people that Aiuppa brought into the hit. LaPietra supplied the gun, Ferriola did a dry run around Sam's house to make sure Blasi had other ways in to not be detected. Ferriola was Giancana enforcer once he only served 3 years, but was actually taking orders from Aiuppa, but Sam kept Ferriola at arms length cause he spent alot of time with Joey Doves, and Alfred Pilotto.