Match each term with the correct definition. Question 4 options: a reasonable person would believe that a crime either had been, was being, or was about to be committed. Probable cause requires an agent to explain the reason and purpose of the search before conducting the search. a police officer's brief detention, questioning, and search of a person for a concealed weapon when the officer reasonably suspects that the person has committed or is about to commit a crime. Black's Law Dictionary. a search incident to a lawful arrest means that it appears a crime may have been committed or may be imminent. The police, under an objective "reasonable person" standard, must have specific & articulable facts present before the search