This. It could be argued that most police don't even need a firearm if their role is not suppressive. In fact, a better division of labor based on a better ru

This. It could be argued that most police don't even need a firearm if their role is not suppressive. In fact, a better division of labor based on a better rules of engagement may even negate the need for the concept of a generalist police officer. Large numbers of containment and assessment roles could largely clear (of bystanders in danger) and control an area until the situation can be assesed properly. Maybe engagement is required and maybe its not. In the event it is, only a small pool of highly trained officers need be draw from to apply lethal force. If its not and an arrest can be made peacefully, then yet another class of police could handle the actual arrest and custody. Dividing the process across different roles should help reduce the spillover of tension and aggression from one phase to the next.