Re: Are you serious? IF you are sure of what he's doing, Turn him in.
I have a loved one in the military, too.
Listen, I know it's hard, but you need to turn him in. Not to the local authorities, but to the Army. His crimes are against the military, and will be handled by the military court, not the civilian court. He will be court marshalled, his career is toast, the records of his misdeeds/crimes will follow him the rest of his life, justice will be served through this, but it will be better for your loved one, because the military has standard protocols for this type of thing. The Army can get him medical or psychiatric attention, disability pay, possible housing, you know, real help. It will also be much safer for you, his ex, and anyone around him.
By you not taking action against this man, you could potentially be considered an accomplice, and charges could be filed against you, too, for trying to protect him. I'm sure the officers you talk to will understand your fears, and not knowing what to do, but if they catch up with him and find out you knew about it, you'll have some talking to do, too. We're talking felony crimes here, 'hon.
Who to talk to? I suggest you call his commanding officer at his permanent duty station, or even the base commander. The Army will probably order you to surrender the original documents, so make sure you keep several photocopies, and take photos of the other contraband material your loved one used to make his forgeries, etc. I'm sure you are aware how easy it is for "the government" to lose files and take forever to get anything done. The FBI may end up becoming involved. Be prepared for the possibility.
I know, being on CZ, that you would rather seek some kind of natural, alternative, gentle treatment or action for your loved one. I understand. But look where you posted. This man is a physical threat to others, as well as a criminal. It may be the hardest thing you ever do, but you need to report him. Then you need to seek legal advice for yourself, including the possibility of restraining orders.