Head turned thought facemask. The main red had the best view and when they huddle to discuss the call the main red asks him “are you sure”.

From his view yes he was sure but the main red should have overruled him assuming he saw it.

This is where I like the new NFL assist where they are looking at every call and then ping the ref and fix it. Best way to do it because that is a difficult call live and depending on your view.