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screaming a little louder and the police say shut the "f" up. >> there can't be any assignment of blame, but we're going to get to the bottom of it. we know when he was first in our custody when he first engaged the police department he was alive. he was responsive. when medical attention came to mr. gray he was unresponsive and not breathing. we're going to figure out what happened. >> mater said by may 1st the results of the investigation will get to prosecutors who will decide whether to file criminal charges. now, the justice department has announced it is opening up a civil rights probe before the investigation is even complete. our national correspondent miguel marquez is coverage the protests and has the very latest. >> reporter: john an incredibly emotional evening near baltimore with up to 2,000 people turning tout see for the first time the parents of freddie gray who show