May 4, 2008: ATF agent Andrew Traver

In the wake of a rash of shootings in Chicago, Traver will tell us how his office works with local authorities to trace illegal weapons, and where those weapons are coming from. He'll also tell us about a new computer that he calls a fantastic resource in tracking those weapons.

That computer also discloses instances of people buying a dozen guns or more, which could be a sign of so-called straw purchasers buying many guns, then selling them for big profits to juveniles, felons, and others who can't legally buy them. Mayor Daley has been fighting for a one-gun-a-month buying limit, to prevent straw purchases.

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