Can a sheriff go into another county without permission of that county to arrest someone?

Generally, a sheriff does not have the authority to arrest someone in another county without permission from that county's law enforcement. However, there are exceptions, such as when a sheriff is in pursuit of a suspect or if there is a mutual aid agreement between counties. Additionally, some states have laws that allow for cross-jurisdictional arrests under specific circumstances. It's important to consult local laws for precise regulations.