John Landesco was the recognized expert on the 42 Gang. He interviewed several members in the 1920s and 30s and is the source for most of the info we have on them today.

*Leaders were called "Smart Heads," and there were several smart heads at any given time.

*Landesco came up with a list of members from his informants, after all, it wasn't a secret organization like the Mafia. Giancana and Sam DeStefano were among them, but others that were later claimed to be members were not in his list. Chuckie English and Willie Daddano, for example, were not listed, making their membership unverified.

*These guys didn't just rape women, they also had sex with each other. Yes, they admitted to this and Landesco documented it.

*Here is a link to one of his articles. It's very informative.
https://tigger.uic.edu/depts/hist/hull-m...co/landesco.htm