What is the primary condition for conducting a pat down during a Terry Stop?

The primary condition for conducting a pat-down during a Terry Stop is that the officer must have a reasonable fear of danger. This stems from the principles established in the case of Terry v. Ohio, which allows law enforcement officers to stop and briefly detain a person for questioning when they have a reasonable suspicion of criminal activity. Additionally, if the officer has a reasonable belief that the person may be armed and dangerous, they are permitted to conduct a limited search, or pat-down, of the individual's outer clothing to ensure their own safety and the safety of others.

This reasonable fear of danger must be based on specific and articulable facts, rather than a vague suspicion or ambiguity. If an officer observes behavior that indicates a potential threat, the pat-down serves as a protective measure to ascertain whether the individual is carrying a weapon. This legal standard is crucial for maintaining officer safety during interactions where an unknown suspect might pose a risk.