During my career as a police officer I investigated several MOB murders and in doing such was put in contact with a CI who spent time in a cell with Chicago Outfit killer Lenny Patrick. This CI through conversations with Patrick provided information about dozens of MOB murders (See: A History of Violence). When this was reported the FBI strongly denied these the possibilities and proceed to block my future efforts at solving these cases, some of the most notable in Chicago. This will be the subject of my next book. Assassination Theater in a well documented production that I found a vindication for my work decades ago and suggest everyone see it.
A History of Violence: