I really don't see how anyone could really think the guy is juicing, he's been working out for 8 years and doesn't have the thickness and density that a juicer does.
first we're not just talking about anabolic steroids, but all performance enhancing drugs.
you can get big without PEDs. You can get ripped without PEDs. But you can't be both for any length of time without them.
If someone got really big naturally at about 10% body fat, then dieted down to 5%, losing muscle mass along the way, he might be able to have a physique like JRs for a few days. If he tried to stay down at a low body fat, he'd keep losing his muscle mass. If he tried to build more muscle, he wouldn't be able to stay at a low body fat.
JR had an incredibly low body fat 10 weeks out of his contest, much lower than any amateur would have aim for on contest day 10-20 years ago. I don't believe its possible to keep your body fat that low and keep or even increase muscle mass without PEDs.