http://time.com/3843870/marilyn-mosby-transcript-freddie-gray/Transcript of the prosecutor's speech today. Long but interesting. It lays out her justification for the charges. It's all based on the premise that the police should have requested s medic for Gray and did not.
Info on Grays death is conspicuously absent. We know what killed Gray (broken neck), but not when it happened, or where it happened, or how it happened, or why it happened, or who made it happen.
And do read the prosecutor's closing at the end of the transcript. She's clearly playing politics here. She's pandering to the mob, not seeking justice.
On net, I'm not convinced she's any better than your average dirty cop. Probably worse, because she has more raw political power and she knows how to use it. I bet she can do far more damage than any cop.