I think it's looking more and more like Roig called Vest during the incident.

Acc. to 00098615, a friend of Vest called Newtown at 2:03 p.m. December 15th to report that Vest said Roig had told him she "heard gunshots" and that there was a substitute teacher next door to her who was "fumbling for keys in an emergency folder."

To me, "told him she heard gunshots" sounds like something you'd say when you're hearing them, you know? I mean, if you walked out of the worst school massacre in recent history, would you tell the story to an old friend as "I heard gunshots?"

I don't know. Just sounds to me like an as-it's-happening type phone call, especially when you add the part about someone fumbling with keys.