Alright, so the explosion came at 16:36:19, near the cafes. And that's mostly where we've been focussing, but the accounts Williams and Falsworth managed seemed pretty consistent on the fact of a gunshot. But we couldn't see it from the cafes on that side that show. So I'm not gonna go I pulled from the ATM across the street.
Here we can see Rogers' team entering. North side, But if we go a few minutes before there's a guy in a hoodie. Idles around the traffic jam and seems to be watching the windows. About when Rogers comes in, you can see a guy setting up in the first window circling, he's got an pretty nice kit. Second man behind, a bit harder to make out. The guy we're calling Barnes gets off two shots, at least one goes down. and leaves. Rogers hesitates, the big blast goes off.
That building was evacuated sometime between 36 and 52, and there wasn't mention of a gsw. The window can be explained away by shrapnel, but a body with a bullet in the brain's harder. Dugan and Kane tracked their guy west and he was decidedly lacking in bullet ridden corpses on hand. Either this guy walked off, or he was extracted before EMS got in there, either by guy #2 or a second team.
Smoke and EMS obscure the camera after 16:39
I've enhanced the video as best it'll go, but that's still not enough for facial recognition to hit anything. I think that second window up there might be involved too though. And I'm sure they're long gone, but it could be worth checking.
I don't think we've got a way around these vids short of bringing in a guy.