Marcus Johnson Jr was shot as his vehicle was leaving parked in their driveway . The gun battle supposedly resulted from a traffic accident , mother testified . Marcus had heart surgery a week before the incident and a post - operation appointment the day of the shooting . His 15-year - old brother and a 69-year - old childhood friend were also wounded .
Marcus Johnson Jr was shot as his family was leaving park in their minivan . The gun battle supposedly stemmed from a traffic dispute , mother says . Marcus had heart surgery a week before the incident and a post-operation appointment the day of the shooting . His 15-year-old brother and a 69-year-old family friend were also wounded .