Mystery passenger was detained when he and Scott were pulled over for missing tail light . The driver of the car told police that a man in his 20s had been sitting behind him on the bus before they got off at the stop sign near the intersection with Highway 1 and Highway 2 Officer shot dead unarmed 50-year-old black father Walter Lamer Scott . Slager can be heard telling dispatcher 'he grabbed my Taser ' after shooting . No indication Scott had ever had the officer 's Taser or used it against him .
Mystery passenger was detained when he and Scott were pulled over for missing tail light . Recording of patrolman Michael Slager 's radio call to colleagues released . Officer shot dead unarmed 50-year-old black father Walter Lamer Scott . Slager can be heard telling dispatcher 'he grabbed my Taser ' after shooting . No indication Scott had ever had the officer 's Taser or used it against him .