NC settled their cases a couple of years ago.
There was a very lengthy documentary about this on TV, way back in the early to mid 90’s. I think it might have been on PBS, but I can’t swear to it. It was a very interesting program and yes, anybody they considered to be defective, was sterilized. That included people with cerebral palsey which is damage caused during the birth process, and is not an inherited condition.
And, it was cruel from what I remember about the program. I think of that documentary from time to time and now that the net exists, I think I’ll see if I can find it again.