Both are lifetime naturals.
I've never spoken to Brian in person, only on message boards and online, but I do believe him when he says that he is 100% natural.
Doug Miller is an old friend, and I know he is 100% natural, not even Pro-hormones. I tried to get him to take M1T back when it was still legal and I was taking it, but he wouldn't. That picture of Doug does not do him any justice, he is much bigger than how he looks in this picture, I'll try to find you a better picture. He hasn't competed in 2 years and right now he is just starting his diet and he weighs over 225 lbs with a Full visible six pack, there are pictures of him on the OCB message board just starting his diet, looks like a natural version of Jay Cutler, never cheats on his diet on or offseason!