No, it isn't. (And "afoot" is one word in this case).
If you want to detain that person or compel that person to ID himself, RS is required. Simply "encounter[ing]" someone is not RS for that. At the same time, running that person through NCIC whithout detention or compelling the person to ID himself (like if you know the name of the person) does not require RS.
See my post above for explanation.
Thanks for the last two post Ari. Your explanations helped me to better understand.
I find it odd that our LEO types couldn't articulate those things.