Chicago Police Department SPOS Practice Exam 2026 – Comprehensive All-in-One Resource for Exam Success!

Reasonable suspicion is the necessary type of information for conducting a temporary detention of an individual. This standard allows law enforcement officers to stop and briefly question a person if they have a particularized and objective basis for suspecting that the individual is involved in criminal activity. This is a lower threshold than probable cause, requiring more than a vague hunch but less than the concrete evidence needed to make an arrest.

The need for reasonable suspicion stems from the balance between protecting individual rights and allowing police to effectively perform their duties. Officers may note specific behaviors or indicators that raise their suspicion and justify a temporary detention to investigate further.

Probable cause, on the other hand, is required for making an arrest rather than a temporary detention. Intent to arrest involves a decision made when officers have sufficient evidence to take someone into custody, which also goes beyond the level of suspicion needed for a mere stop. An affidavit is a written statement confirmed by oath, typically required for obtaining warrants or in court proceedings, but it is not necessary for the temporary detention itself. Thus, reasonable suspicion stands as the correct criterion for this scenario.