According to https://en.wikipedia.org/wiki/Citizen's_arrest, yes but it relies on state law so the specifics vary state by state.

It’s just tradition. Early popes used their own names. The tradition started in the 6th century because an elected pope was named Mercurius after the Roman god and he thought it was bad PR to keep it. The last pope to use his birth name was in the 16th century (Marcello II)

And some (for example, most of continental Europe) take it further and have a duty to assist, where if there’s no one more qualified to help you are required to do your best to assist.