The US has lots of different police forces – city police, county police, state police. Many other countries have more centralised policing with fewer levels. I think, a smaller number of bigger police forces might promote more professionalism, more professional management, oversight by more experienced politicians (state political leaders tend to be more experienced and capable than local political leaders, especially when talking about smaller cities). That would suggest abolishing city-level police forces and merging them into the county-level police force, even abolishing county-level police forces and merging it all into state police.