In 1958, Dellacroce was arrested for vagrancy. I would think that the other guys were also arrested for tha same thing and were not necessarily connected with eachother.
Speaking of this, maybe I don't understand the concept of "vagrancy" very well, but if I do, and it really does mean "being a homeless person, a bum", then how on earth can a mafia member be EVER in such a situation, unless he wanted to tease the cops on purpose? It doesn't make sense even for the lowest associates, unless it's some drug addict used for just one time to deliver a package.