Thanks for the chance to help. I am an attorney with over 12 years military law
If they want to give him an "other than honorable" (OTH)? Then he can fight it. To give an OTH the Army MUST give him both a hearing and an attorney. He can also hire an attorney to assist.
At his hearing he can make his case to the board. He wants to volunteer to deploy? Let the board know. He can also present evidence, both from live witnesses and from statements to the board. Statements in support. Statements that explain his value to the Army.
If he can get a few of these, that can help his request...that is, if there is anyone in his chain of command that will "go to bat for him" that can help quite a bit.
And a lawyer can help.
While these are often difficult to win, an attorney with years of experience can often get a better result then relatively young attorney out of law school, which is who they are given to defend by the Army.
I would talk to several folks with experience and a willingness to fight. Talk to them about the number of contested jury trials. The more the better, and not 10 or 20, but 50 or 200, or more contested jury trials is a good sign they have trial experience. If they have the ability to try a case, they have the ability to get a good result.
Prior military experience is also valuable, and in some cases a retired officer
may have shared experiencs with the person bringing the charges. Sometimes this can help.
Let me know if you have more questions