confidence in this case because she did move rather quickly. >> as you know jeffrey tuben, you're a former prosecutor -- toobin. convicting police officers before a a jury in a case like this is very difficult. >> it is and what makes the case unusual, is it's not one police officer whose conduct is at issue. it's a whole group of them. one thing i think is going to be very important to keep an eye on if any of them decide to plead diltty to lesser charges and cooperate against the others there will be a lot of effort made in that direction. the prosecutors will need at least one witness to tell the story of what happened. because someone's got to say, what went on in that police van. now, sure you can try to prove it through forensic evidence but autopsy evidence but it would be much more powerful for a jury if at least one of those officers said look i was