william gahl is the program's lead investigator.u see these pictures, they are pretty incredible. did you think steroids? >> sure. we pretty much all saw it except the letter said she's not taking steroids, she's not taking anything anabolic, and she did weight lift a little bit but many years before. so there's no possible effect of that. so the endocrinologist had eliminated all those things we would naturally think about. >> reporter: during a week of intense tests, there are scans. blood work. an examination of everything going on inside sally's body. >> so this is sally's mri of the brain. that's pretty incredible. >> reporter: when the images were found, it was seen that the muscles, even the muscles that govern the movements of the eye, which are really small muscles, are huge. the radiologist saw this and sort of went wild over this. look at the size of this, they're three to four times bigger. >> reporter: they've probably never seen anything like this. >> right. because there's no way to make those muscles big by moving yo