Denser populated areas especially east coast there is often a county police also. There is still a sheriff but they don't do active law enforcement. What they do everywhere is they are the court's delivery service. Active search warrants and arrest warrants are are police but other court papers are delivered by the sheriffs department. So a summons for a lawsuit, eviction notice etc. They also deal with old warrants. The local one here emphasized how much he had reduced the backlog in his campaign last election. Did things like mail letters saying they had won a prize to the last known address of wanted people and arrested them when they showed to collect.
