Here we go again, beating this horse.
Cop see's someone driving, too fast/too slow, draws attention to that car. There are sooooo many things that make us think the driver may have been drinking.
Cop pulls driver out, does FST's. (I routinely tell the driver he is doing fine, no matter how bad he is doing, just so he won't panic if he puts his foot down, etc.)
Cop does HGN test.....even before the guy turned his head, those pupils were probably bouncing. Blowing .11 was just the icing. Your friend was going to be found guilty before he even got to the machine.
Tell him to save a little dignity, take responsibility for his actions.
"I don't care if you think you were speeding or not....Sign the ticket, or go to jail"
Win if you can, Lose if you must, BUT....Always cheat !