Documentary materials concerning film plot :

1. St. Valentine's Day Massacre

 Real story

   2.  Fred Burke

Dossier

3. Jack  McGurn  and  Louise Rolfe

Dossier

4. Newspaper  articles

Dossier

6. The Victims on the North Clark Street

 Real story

 About seven

7. Al Capone

8. The arrest of Al Capone