Was he charged with conspiracy to manufacture, or manufacture of meth? Did they bust him at a lab? Is there any physical evidence involved?
I don't know, but I would believe that the ID of the informant could not be easily found out early on in the game, although he may find out at or shortly before trial. This is ONLY a guess as to what I think it SHOULD be like. I would think that they would have to produce the guy at trial, and inform your lawyer at some point beforehand of his ID to "check into" him and his credibility, etc., but I also believe that there would be grounds to keep CI's identities secret to keep 'em from tirning up dead prior to certain trials. I don't think that it would be easy to find out if it's possible at all prior to trial time, and in paperwork/reports/etc., they CI would likely be referred to by #. Again, this is only a guess, and maybe someone else will wade in with a knowledgeable answer.