You've probably heard of how legendary mobster Al Capone's criminal empire was disrupted by investigator Eliot Ness and his group of "Untouchables." But what really happened in Chicago, and what was invented by Hollywood?

Max Allan Collins, author of the 2002 Chicago mob story "Road to Perdition," and A. Brad Schwartz, a Princeton historian, talked to relatives, re-examined evidence, and sifted through newly-released federal files to separate fact from fiction.

Just when you thought there was nothing new to say about Capone and Ness, what they found surprised them.