most important witness in the case so far emerges. we start with jay gray. reporter: anger and emotion boiling over again in baltimore. to this point there s been no answer to their question and very little information. we have exhausted every lead at this point in time. reporter: as the task force investigating the death turned over its finding to state prosecutors, police acknowledged the van transporting him made four stops on the way to a police substation j not three as they originally indicated. this new stop has been was discovered from a privately owned camera. reporter: a report in the washington post citing a sealed police document says a prisoner briefly in the van but separated by a metal partition heard him banging against the walls and that he was intentionally trying to injure himself. donte allen was the man on the