Yes, to Foot
My question also was going to be how much had you drank the night before, and how many hours had elapsed before the arrest as well. I had a man who presented with a very high BAC, yet he swore he'd not had anything that morning, only the night before. His alcoholism career had been an impressively long one. Not only was he more tolerant requiring more booze to get the buzz, his body took a very long time to metabolize the alcohol out of his system.
After much further discussion, it turned out he'd consumed more the night before than most people were capable of. And finally we figured out that his idea of "the night before" actually ended up at close to 5:30am. He'd slept just a couple of hours and got up, ready to start the cycle again.