Immigrants to the U.S. are partially to thank for a dipin crime in this country. That's according to a new study out ofCU-Boulder. The national crime rate started to go down in theearly 1990s. That's about the time substantial numbers of newimmigrants, legal and illegal, began to arrive. Sociologyprofessor Tim Wadsworth is confident there's a link between those twotrends. He's spent 15 years studying changes in the crime rate. Wadswroth speaks with Ryan Warner.
