As others have noted, I think they learned something from their handling of Ray Franz. They can't keep him from testifying in court if summoned, but they can keep him from writing a book. Giving him a house and whatever he might need, contingent on keeping his mouth shut is doable.
I'm also guessing that where they hid him was in a residential rehab facility. If he really did have a drinking problem, getting him dried out would be a priority. The last thing they want is a raging alcoholic GB member giving press conferences. They also can't give out details of his health problems (HIPPA) but they can say he is being treated. When the time comes they could try to sell all of this to the rank and file as an example of Jehovah taking care of the flock.