The question was posed about whether they allow people who have professional knowledge, not just regular people, to help in a medical situation. If they do not allow people with professional knowledge to come up, state their profession, and then help, Nelson should have made that clear on her cross-examination when she testified that she, a FF, was not allowed to help.
I don't know how "common knowledge" it is that they don't allow professionals to help. There's a professional replying with us right now that says she's never been stopped from helping when police are there but EMS isn't.
Here's what she said:
IMO, the testimony should be considered along with the rest of the bystander testimony. The gist for me is that lay people and experienced people saw that GF was in distress, but DC continued maximal restraint despite advice from laypeople, regular people, and his own fellow officer TL.