The loud sound was the doors being blown open by the cops, because Cho had chained htem closed. Cho's shooting ended on, or about that time. No shots were fired by any police.
"The point I was making is that he didn’t “run around loose for 8 hours” as some have claimed."
That's right. He died before 10:15AM ET, shortly after he began the 2nd attack.
I’m not sure about the ‘blown open door’ part, because as a rule of thumb you wouldn’t use an explosive for a breach. Usually it’s a ram or a halligan or just brute force. And from the way it appeared to be playing out, I don’t what use a flash-bang would be either. I think we’ll have to wait out the actual report to figure that out.
From the kid’s cell phone video, you can see all the deputies make a bee-line for the door all of a sudden, which would normally indicate there was no organized SWAT entry, because you generally get the uniforms out of the equation once SWAT gets involved. Very practical reason for that, the team members know what each other does and will do, not so with the uniforms.
That looked like sort of a cavalry charge to me, which leads me to believe they didn’t spend a lot of time waiting around before they went in.
Well... we’ll have it all when the report’s filed.