That said, police are human beings and can freeze or otherwise freak out. Nobody ever knows how they're going to react in the moment for the first time.
Where do they draw the line for a "serious offense"?
You forgot that they were trained to expect the unexpectable. They are not like you and me with no prior training against violence.
Why the 26 minute tape delay? Has Jake Tapper asked this question? If so, I haven't seen a good answer. Certainly it wouldn't be to help the SRO control any video evidence of criminal behavior. that's crazy talk.