County sheriffs aren’t shot at the border when they attend state court (in another county), but they don’t have jurisdiction so they can’t act as a law officer (e.g. arrest someone) in a foreign county.
That’s a pretty far reaching statement that is wrong in most places. Laws (typically) concerning police are at the state level, and they can act across their state.* Most states also extend jurisdiction to other states’ police in specific circumstances. They ALSO extend jurisdiction (which is really sort of a formality because are they actually going to go against the bigger government?) to federal police/agents, typically limited to felonies.
*some exceptions are carved out, like traffic stops and where the arrested are to be transported and by who the arrested will be transported by.
That’s a pretty far reaching statement that is wrong in most places. Laws (typically) concerning police are at the state level, and they can act across their state.* Most states also extend jurisdiction to other states’ police in specific circumstances. They ALSO extend jurisdiction (which is really sort of a formality because are they actually going to go against the bigger government?) to federal police/agents, typically limited to felonies.
*some exceptions are carved out, like traffic stops and where the arrested are to be transported and by who the arrested will be transported by.