There's an article in the Atlantic[1] that explains that there have been a good deal of civil cases settled for police brutality and racism, but none of the perpetrators have been charged. It seems to me that there is no reason for a person to die in custody, but right now, the people in charge of Baltimore don't have an explanation of how Freddy Gray died.

[1] http://www.theatlantic.com/politics/archive/2015/04/nonviole...