CNN Anderson Cooper 360 March 3, 2015 04:19:00
Officers could not subdue a man who was unarmed, and homeless, even after he was already tased. >> stephanie, appreciate it. more now on what the video we've been watching actually reveals, not just to expert eyes, but also expert ears. the audio angle now from our jason carroll. [ gunfire ] >> reporter: key to the investigation in the lapd shooting will not just be what the officers did, but what they said. paul ginsburg is a recorded evidence specialist. he's been in the listening business for 40 years. think of him as an audio archaeologist, a man who digs for sound. >> it's a puzzle. each ...