My grandmother (his wife) passed a little over 4 months ago. My grandfather's brother tried a week after her passing to get all my grandfathers cars, deed to the house to sell, and anything he could get his hands on. The family confronted my grandfather's brother which resulted in him leaving back to New Mexico (which made it clear he only came for the items and money he thought he could get). Now this same brother again is trying to talk my grandfather into signing everything over to him and has gone as far as trying to marry him off to some random women in order to get everything. We know that my grandfather would never agree to this when in his right mind. He is being greatly taken advantage of by his brother and would like to know of any advise that we as a family can put a stop to this.