Madisgram...I've thought about you a lot today while at work. I don't understand why your sister has made no attempt to pay you back the money she stole from you...even in small increments would show some kind of good intention.
I just looked at your initial post about this, and see that it happened in '89? That is now 20 years gone by. I don't know what the legal ramifications are when so much time has elapsed. I would seek out some kind legal counsel as soon as possible. If it can be pursued, you have nothing to lose in the matter, considering that your sister has estranged herself from you. She has done this, no doubt, out of guilt over this theft, and she can't stand to be reminded of it.

If a person runs up a credit card, or borrows money and then doesn't repay, there are legal consequences, like garnisheeing wages, or seizure of property. I would hope that the legal system could work for you in this matter. Odds are your sister would say you "gave" her your money. I hope you have some kind of paper record of what was deposited. Any half-intelligent judge would realize you were in a very vulnerable state when this transpired.

Patty