Jonathan Eig

I think it's one of the great mysteries.

It's one of the greatest unsolved crimes in all of American history.

And you really have to unpack it to try to understand who might have been responsible.

But I think that there's a good chance that some of the guys around Capone were involved in it.

But bottom line for me is that we still don't know.

All right.

Well, who might be the leading suspects?

Well, there are a lot of them.

The problem with Chicago gangland in general is that there are just almost endless rivalries and almost endless numbers of competing gangs.

So some people thought the Purple Gang out of Detroit or Egan's Rats out of St.

Louis might have done it.

Then there were other gangs in Chicago that were...

Circling around gangs that, you know, you probably haven't heard of.

I think some of the guys associated with Capone were probably involved.

You know, guys like Jack McGurn and Killer Burke.

First of all, when you have the nickname Killer, when you have the nickname Machine Gun Jack McGurn, you're going to be a suspect.

And of course, one big theory is that the cops did it and there were no gangs involved at all.

When you think about murder in general, what do we know?

It's usually a crime with some anger involved.

But why would somebody want to kill someone?