Yes, as your original post asserts, there is some large problems with the Baltimore PD, but it ain't racism. Just like there are some huge problems with the Baltimore school district (one of the highest spending per pupil in the country, yet still a train wreck) and it ain't racism. It's sh**tty management by the elected officials of the city. That tends to happen when one party is in charge for half a century.
That's interesting and surely it's worthy of mentioning to understand the context. However, can you explain me the correlation between the problems in the Baltimore School District and the circumstances around the arrest of Freddy Gray?
Here's a timeline:
http://data.baltimoresun.com/news/freddie-gray/On the other hand, I highly doubt that the "huge problems" in a certain school district can explain the general problem I was referring to ("inequality", "lack of opportunity", etc). It's more useful for that purpose checking statistical data than mentioning examples of successful individuals like President Obama.