Listening to the True Murder podcast (which does a mix of crime stuff and occasionally has some good OC stuff) I came across the story of Jimmy Velasco, his 1948 murder and the payoff list that surfaced afterwards. If your name wasn't on that list then you weren't anyone of consequence in the town.

The story:

http://www.cigarcitymagazine.com/articles/people/item/tampa-gangster-jimmy-velasco-2

And the podcast interview with the author (about an hour long, and very interesting):

http://www.blogtalkradio.com/dan-zupansky1/2013/04/18/tampa-bay-organized-crime-paul-guzzo

Real 'old style' mafia fans should enjoy this stuff.