Philadelphia DA on what can be done to curb gun violence

A mass shooting on the eve of the Fourth of July left five people dead in Philadelphia. It was just one of several U.S. cities that saw violence on the holiday. The suspect, 40-year-old Kimbrady Carriker, was arraigned Wednesday on a host of charges, including five counts of first-degree murder. Amna Nawaz discussed the latest with Philadelphia District Attorney Larry Krasner.