In 1944, the quiet town of Mattoon, Illinois was shocked when a stretch of gas attacks were reported. Very little evidence was found, which led to only more questions about the alleged assailant. Could the dozens of incidents in Mattoon be due to an attacker? Could it be pollution? Or is this due to something like mass hysteria or a ghost? We discuss all of the options on today’s episode of Mysteries of The Ohio Valley. Learn more about your ad choices. Visit megaphone.fm/adchoices