I was in the Army and had a friend who did a dbol cycle while in Albania. The military doesn't regularly test for juice, because it's too expensive, only narcotics, etc. (basically weed, X, coke, opiates, all the rec drugs). HOWEVER, if you are suspected of using AS you WILL be tested by your unit. Someone ratted on my buddy when he came back to Germany, and he was hounded by the "Army narc cops (CID)" with multiple piss-tests. He told them that he used every supplement under the sun, and the results came back negative, so he didn't get popped, but I think that's because the dbol metabolites were long gone from his system. If your friend juices, make sure he sticks to fast-acting gear, like dbol, anadrol, oral winny, etc., and if he's injecting only tren, test prop or test suspension. If he uses deca he's fucked!
Hope that helps bro.
DAW