Most American agglomerations aren’t single cities, but rather metropolitan areas containing different cities or even counties. Let’s take the San Francisco Bay Area. It is composed out of nine counties: Alameda, Contra Costa, Marin, Napa, San Francisco, San Mateo, Santa Clara, Solano, and Sonoma. All of those counties have different Sheriff’s Offices. There are cities like San Jose, San Francisco, Oakland, Fremont, Santa Rosa, Redwood City, Concord, Fairfield, Berkeley, Napa, San Rafael, Hayward which have their own respective Police Departments. That gives us 12 different PD’s!

With crime not knowing any borders or limits, how those Sheriff’s Offices and Police Departments manage to coordinate fighting crime? Is there any central institution for the coordination of different SO’s or PD’s? How police detectives manage to find criminals hiding outside their jurisdiction?
More thoughts on the topic:
Isn’t there some kind of law enforcement structure on the state level?
For example, in California, there’s California Highway Patrol, which serves as the State Police. They mainly control the highways and state roads, but they also have jurisdiction anywhere in the state of California and can aid local LE if necessary.

BUT, can they also coordinate various LE agencies, command them to do something, etc.? Isn’t there ANY state supervision over the local agencies?