Which standard justifies an arrest or search based on a reasonable belief that criminal activity is afoot?

• A. Probable Cause
• B. Reasonable Suspicion
• C. Beyond a Doubt
• D. Preponderance of the Evidence

Answer: (A)

Probable cause means there are reasonably trustworthy facts and circumstances that would lead a prudent person to believe that a crime has been or is being committed, or that evidence of a crime is present in a specific place. This level of belief justifies both arrests and searches (including searches under a warrant) because it requires more than a mere hunch but not absolute certainty. Reasonable suspicion is a lower standard used for brief investigative stops and does not by itself justify an arrest or a full search. Beyond a doubt is not a formal standard used in criminal procedure, and preponderance of the evidence is the civil standard of proof, not the criminal standard for arrest or search.