autopsy. we will go to baltimore with brian todd. thousands are expected to come out tonight. maryland's governor sending state troopers to control the crowd. what's the scene right now? >> reporter: we're in the front of city hall. a crowd has been organized by the naacp to come to this rally. we are -- we're here in the middle of this crowd. various speakers have been speaking for the last 30 minutes or so. this crowd determined to try to keep up the energy and pace of these demonstrations. we've been in the streets the last couple of nights where they've been matching through the streets. this crowd here this just kind of staying where they are in front of city hall. basically, these people are inpatient with the pace of this investigation. and kind of frustrated with the fact they're not getting the answers they need from the police from city hall to some key questions, what happened to freddie gray inside that van.