Al was the best man at Ricca's wedding...also Ricca managed a striptease joint which was owned by Capone,named The World Playhouse. He even got rid of his mentor Joe Esposito for Capone because Joe became a political rival of the Capone gang.Ricca and Capone took over every criminal operations and political connections that Joe left behind.Story goes that Ricca had a very good reason to kill Joe because he was in Joe's debt big time. After that Ricca became Al's messanger and connection with the rest of the national crime families.