 Big Boy, a fictional analog for Al Capone, made his first published (though apparently not chronological) appearance in "Dick Tracy"s second Sunday strip (October 11, 1931).In that self-contained story, Tracy, already a member of the police department's detective bureau, leads a raid on Big Boy's nightclub in order to arrest the mobster, and is able to thwart Big Boy's escape.On October 12, 1931, the daily strip began its run.