There was one Santina DeMarco who was a friend of Caifano's wife Darlene, and testified during the divorce between Caifano and his Darlene as a witness that Caifano allegedly was quite cruel to his wife. Since Giancana fucked Caifano's wife Darlene, it is possible thats why Santina DeMarco had the courage to testify against Caifano mainly because he had problems with both Giancana and Battaglia's crew at the time.

During the 50s and 60s there was also one Mike De'Marco who worked together with Americo DePietto in the dope trade. DePietto answered to Giancana and Battaglia.