Most cops have basic (and annual) first aid training. They are also trained to identify themselves.
It is perfectly normal to act on training in situations that you have trained for. It also serves the purpose of letting the bystanders know that he will not flee the scene of the accident and is trying to help.
This cop did nothing wrong and you should get over your knee-jerk irrational hatred of all things LEO.
Many of them may be your allies in TEOTWAWKI.
“This cop did nothing wrong and you should get over your knee-jerk irrational hatred of all things LEO.”
A fatherless, injured four year old would probably disagree with you.
I for one am not counting on that and I believe that anyone that is is delusional.