In 2012, Brockovich became involved in the mysterious case of 14 students from LeRoy, New York, who began reporting perplexing medical symptoms, including tics and speech difficulties. Brockovich believed environmental pollution from the 1970 Lehigh Valley Railroad derailment was the cause, and conducted testing in the area. Brockovich was supposed to return to LeRoy to present her findings, but never did; in the meantime, the students' doctors determined the cause was mass psychogenic illness, and that the media exposure was exacerbating the symptoms. No environmental causes were found after repeat testing, and the students improved once the media attention died down.