1. If any peace officer reasonably believes that any person whom the peace officer has detained or is about to detain pursuant to NRS 171.123 is armed with a dangerous weapon and is a threat to the safety of the peace officer or another, the peace officer may search such person to the extent reasonably necessary to ascertain the presence of such weapon. If the search discloses a weapon or any evidence of a crime, such weapon or evidence may be seized.
2. Nothing seized by a peace officer in any such search is admissible in any proceeding unless the search which disclosed the existence of such evidence is authorized by and conducted in compliance with this section.