Probable Cause Definition

Reasonable suspicion of the presence of evidence of criminality, allowing the search of the person or premises for such evidence by authorities.
American Heritage
Reasonable grounds for presuming guilt in someone charged with a crime.
Webster's New World
A necessary element of a legitimate arrest or legal search and seizure; a reasonable ground to believe that someone is committing or has committed an offense. It must amount to more than just suspicion, but need not rise to the level of evidence justifying conviction, according to Fourth Amendment to the United States Constitution.
Webster's New World Law

(US) The standard by which a police officer may make an arrest or conduct a personal or property search.


In accident investigations, the conclusions reached by the investigating body as to the factor or factors which caused the accident.


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