How can I help my son get visitation rights with his daughter? 4 Answers as of December 27, 2011

My adult son has a serious learning disability and is bipolar, and he has a life threatening medical condition. He has never sought custody of his daughter because he knows he could not take care of her on a full time basis. He does however want to see her on a regular basis. The problem is the mother has a long drug history and moves in boyfriends who have been convicted of felons including sex offenses. Every time my son shows concern she threatens him with moving away or goes to court when he is in the hospital and tells them that he shows no interest in his daughter. Even though the judge made an order for my son to have an advocate due to his disability she ignores it she has tried to trick him into signing away his parental rights by telling him it was a visitation order. Now she has both her daughter and her boyfriend living there, both are convicted felons. When I confronted her with my concerns over my grand daughter's well being I was met with a threat that her adult daughter would accuse my son of abusing her when they dated some 14 years ago. This young lady has accused her mothers current boyfriend of the same thing in the past but then claimed she lied because at the time she did not like him. The boyfriend threatened me by making his hand look like a gun and said he was coming for me I better watch my back. The police were called but they diminished his threat and decided it was just a custody case. My problem is that both of these people living with the mother of my grand daughter have been arrested and convicted of violent crimes. Both are on probation. My grand daughter seems extremely afraid and stressed. The mother is brainwashing the child to believe that her dad and his family are horrible people and she needs to be afraid of us. This young woman could easily ruin my sons life and the stress could ultimately kill him. Both of these woman have taken advantage of him for years due to his disability and have wiped him out financially.