Audio Analysis: Getting a Jump on Gun Violence

Around 2 a.m. on March 8, 2008, officers at the East Palo Alto, Calif., Police Department received a computer alert. Barrages of gunshots had just been fired in the 2100 block of Capitol Avenue and nearby at the corner of University Avenue and Bell Street. Driving down Bay Road toward University Avenue, the sergeant who responded spotted a dark sedan pulling away at breakneck speed.