I never said in any post said that there was a requirement to roll down all the way down.
All I stated is that Hill could have avoided the whole situation by rolling down the window & placing his hands on the steering wheel when the officer approached his car.
I was on one of these military installations for 4 years.
Our Base Commander lost his son to a drinking & driving incident right before after I arrived at Patrick AFB.
It wasn't any fun trying to get on base after a night of fun most of my time there...
Flashlights in the eyes, hopping around on one foot...etc
The missed point is that most of the time you can have an interaction with an overbearing jaded police officer and come out unscathed by just being complaint.