I used to read about Delbert Coleman in Russo's book Supermob.Del was a shady businessman and a big stock holder with close ties to Sidney Korshak, the Outfits lawyer and top fixer.Del also had ties to the Chicago Outfit,Cleveland mob and the mob in Milwaukee.Del was also connected to many high profile people,like bankers and politicians.He was mostly involved in the jukebox business and the Teamsters and was one of the owners of the Stardust and few more casinos in Vegas.To tell you the truth i really dont remember reading about him being an informer...all i knew that Glick was the one that gave information on him.