His executive functioning is suffering (I witnessed his doctor tell him this at the VA) and he is in complete denial. He has put down money on a house, has leased two cars (we are already trying to go after the dealership for doing this) and is in debt to many friends as a result. My Mother has mental issues and is totally dependent upon him and will not stand up to him in any way. We are afraid he'll kill someone drinking and driving (which he's done previously) and/or himself and Mom. We have begged him in every way to stop driving. He and she are now living in an assisted living; they are understandably fed up as he's constantly harassed them to work a deal with him on rent. They let him give notice and now we're on our own. No one in the family can afford a lawyer.
OK, well, looks like a florid case of "all the easy problems have been solved already." Few things remaining you can try: 1) Make a report to the DMV; state laws vary, yours might end up having him required to take a test of some sort or he will be driving without a license, at which point police can become involved. I suspect there is some reason that won't work or you'd have done it already. 2. Make sure your names are not on any of his accounts or credit cards so you do not end up personally liable. 3. Collect any and all documentation you can that will support his incompetency and need for guardianship, as it may become possible and necessary if he does not manage to do himself in first. 4. Get ready to pick up the pieces and take care of Mom. She may end up having to declare bankruptcy and needing help to do that, or with Medicaid application if that is possible in her situation, and if not, she may need care from her remaining family or paid for in some other way.