Very interesting! I studied History at university, and one of the subjects I specialised in focused on America in the 1920s. While I vivdly remember learning about the St Valentine's Day massacre, I don't remember learning that Al Capone lived out his autumn years in comfort, out of jail. It just shows the importance of questioning what we are taught and doing our own research. Otherwise our "education" is simply propaganda.
The St Valentine's Day massacre an "unsolved" case? How convenient! Maybe just another instance of police and "authorities" being very cosy with mobsters.