A group of high school girls who go to school at Leroy High School, in the state of New York have suddenly developed a tic, they developed suddenly and out of the blue. One girl was brought to the hospital after she woke up from a nap and started involuntary ticking. There have been 15 people total all but one were girls. They have been looking for possible environmental causes, the team test local ground samples for answers. The team is looking into the possibility of a train wreck that happened many years ago that leaked a solvent called trichoroethene which could be affecting these girls. Doctors have diagnosed them with a stress disorder.

http://patdollard.com/2012/01/erin-brockovich-tries-to-solve-towns-teen-girls-tourettes-break-out-with-video/