Pacifism is the opposition to war and violence. Does radical pacifism reject the use of violence by the police force?
Groups that avow extreme forms of pacifism — Mennonites, the Society of Friends (aka Quakers), philosophical anarcho-pacifists, etc. - reject all forms of violence, whether between states, between a state an its citizens, or between citizens. This would include police violence. Such groups usually use a community intervention model to deal with transgressors, with penalties that might range from counseling by elders to community sanctions to expulsion from the community. Generally speaking, all pacifists will hold that problems are best resolved through discussion and reparation, with the assumption that transgressors will respond appropriately to religious or philosophical arguments.