I think it's more an issue of incentives than political inclination or geography. The police have a lot of power. Any investigations into officer misconduct (

I think it's more an issue of incentives than political inclination or geography. The police have a lot of power. Any investigations into officer misconduct (at least prior to widespread cellphones) generally resulted in the officer being cleared. That means that there's little/no incentive NOT to do something bad; the odds you get caught are minuscule. Even if there are no truly evil, bad actors the lack of a restraining force means that even with random events and outcomes, officers will tend to behave worse and worse on average. Initially bad events are outliers but as more happen with no repercussions the average slowly creeps towards "worse" and what used to be rare becomes commonplace. So to me it's clear that the police need better management from folks who really get a kick out of putting very, very bad guys behind bars. If a normal person murders someone they get the full force of the justice system against them. If an officer does so, currently they tend to get white glove treatment. We're seeing that the trend might be changing a little in Baltimore, but we won't know for sure until the trial is done. They don't have to be convicted in order to know that the trend has changed, but they need to be VIGOROUSLY prosecuted for what happened.