this is emblem ache of exactly what we should see in terms of protestors getting their voigt out and being heard. >> poppy, we'll stay in close touch. showing viewers live pictures from the skies over philadelphia, over baltimore. the protests clearly growing. other cities expected as well. let's bring in our justice correspondent pamela brown. pamela, new information, new questions. why didn't the police know about this fourth stop previously unknown? tell us what you're learning. >> wolf this previously undisclosed information about this stop is stunning. police didn't find out about it until recently. the information came to lie after a thorough review of cameras, no the from the police officers involved with freddie gray's arrest. now, the video footage of this stop was taken from a security camera right outside of a small corner grocery store. stops like this are supposed to be logged by police. usually radio dispatches by the driver but police say that didn't happen in this case. >> the second stop has been revealed to us during the course of our investigation, and was previous