[Rogue Leader]

Ok so let me preface this with my sister is an idiot.

Long story short a few years ago she ended up unknowingly (shady dealer) co-signing a loan for some "friend" who wanted to buy a new car and had no credit. WTF this kid needed a new Acura for we will never know, but basically he proceeded to lose his crap job, never pay the loan, car got repoed, sold, when all was said and done my sister got left holding the bag for $7000.

Over the past few years he has been "promising" to pay it back but never comes through, he always has an excuse. Well now he has joined the Marines and I'm pretty sure they gave him a signing bonus, yet he still has every excuse in the book.

So heres my question. Is there any simple recourse we can take through the military to get the money from this kid? We realize that this may require a lawyer and whatnot, but just was wondering if anyone knows or had experience with this. I would assume (maybe wrongly) that the military would frown upon a situation like that and try to make him straighten it out before taking him in. Any ideas?