But if you want to be scientific about it, there are lots of statistics that show that black people are more likely to be stopped by the cops
Yeah, and if you want to be scientific about that, and be honest, you'll see that cops stop a lot more people in high crime areas, and that poor urban areas tend to have lots of crime. And that some of those poor areas have a larger black population. If those areas weren't marinated in serious crime, there wouldn't be so many warrants out, stolen cars, cars full of contraband, and the rest.
In Baltimore, New York, and most other urban areas, the cops and DA are under a lot of pressure to get "results," i.e., mess up somebody's life.
What? The people whose lives are messed up are those who have to live in areas like west Baltimore where local thugs make daily life miserable for everyone else who lives there or tries to run a business there. So yes, the cops are asked to "get results," because the absence of any results would make those areas completely lost to civilization, rather than just sucking generally. Would you rather that the cops were told NOT to arrest known violent gang members, serial assault and battery specialists, and the like? What would you have them do?