Al Capone and the Chicago Underworld (Mystery Rummy, Case No. 4) Players collect Evidence cards for each gangster and score points by making melds Playing Gavel Cards Adds A Strategic Twist To The Game If A Player Has A Complete Set Of Evidence Cards For Any Member Of The Gang At The End Of A Hand, It Results In Bonus Points And If All Eight Al Capone Cards Are In A Player's Possession-It's A Shut Out!