Here is one I could find
http://watchtower.observer.org/apps/pbcs.dll/article?AID=/20040323/JWANDSOCIETY1/10623005
I remember reading about another case where a woman went to her OB/GYN for pelvic pain and her doctor ran tests for STDs even though the woman told her she was not sexually active. A JW employee saw the STD tests in her medical record and reported her to the elders. Unfortunately, I could not find this particular story on Google.