That´s something I´ve been trying to figure out for years. I´m waiting for some FOIA files to arrive soon. Hopefully there is something that could shed some light on this. It´s certain though that Gigante and Manna were both part of the same crew in the early 1960s (Tony Bender´s crew). My guess would be that Manna was a member of Gigante´s crew before he became a consigliere.