Chicago Police Department (CPD) Practice Exam 2025 - Free CPD Practice Questions and Study Guide

Question: 1 / 400

What legal concept allows police to detain someone based on reasonable suspicion?

Probable cause

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Stop and Frisk

The legal concept that allows police to detain someone based on reasonable suspicion is known as "Stop and Frisk." This practice is rooted in the Fourth Amendment of the U.S. Constitution, which protects individuals against unreasonable searches and seizures. Under the Stop and Frisk standard, law enforcement officers are permitted to stop a person and conduct a brief investigation if they have a reasonable suspicion that the person is involved in criminal activity and may be armed.

Reasonable suspicion is a lower standard than probable cause, which is required for arrest and obtaining search warrants. The key aspect of Stop and Frisk is that it allows police to act on their instinct, intuition, and the facts at hand, enabling them to ensure public safety and prevent crime when they perceive a potential threat. This practice has been upheld by various court rulings, affirming that as long as officers can articulate their reasons for suspicion, they can legally stop and question an individual.

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