What is probable cause and how does it affect what police officers can and cannot do?

Probable cause refers to the reasonable belief that a law enforcement officer has sufficient reason to suspect that a person has committed a crime or that evidence of a crime is present in a specific location. This legal standard is crucial because it serves as the foundation for obtaining search and arrest warrants and justifying arrests without a warrant. Without probable cause, any evidence obtained may be deemed inadmissible in court, and officers may face legal consequences for unlawful searches or arrests. Thus, it acts as a safeguard against arbitrary actions by law enforcement.