The Mad Gasser of Mattoon (also known as the "Anesthetic Prowler," the "Phantom Anesthetist," or simply the "Mad Gasser") was the name given to the person or people believed to be responsible for a series of apparent gas attacks that occurred in Mattoon, Illinois, during the mid-1940s. More than two dozen separate cases of gassings were reported to police over the span of two weeks, in addition to many more reported sightings of the suspected assailant. The gasser's supposed victims reported smelling strange odors in their homes which were soon followed by symptoms such as paralysis of the legs, coughing, nausea and vomiting. No one died or had serious medical consequences as a result of the gas attacks.

Police remained skeptical of the accounts throughout the entire incident. No physical evidence was ever found, and many reported gassings had simple explanations, such as spilled nail polish or odors emanating from animals or local factories. Victims made quick recoveries from their symptoms and suffered no long-term effects. Nevertheless, local newspapers ran alarmist articles about the reported attacks and treated the accounts as fact.

Mad Gasser of Mattoon

The attacks are widely considered to be a case of mass hysteria. However, others maintain that the Mad Gasser actually existed, or that the perceived attacks have another explanation, such as industrial pollution.

Mad Gasser of Mattoon

Appearance

Most contemporary descriptions of the Mad Gasser are based on the testimony of Mr. and Mrs. Bert Kearney of 1408 Marshall Avenue, the victims of the first Mattoon case to be reported by the media. They described the gasser as being a tall, thin man dressed in dark clothing and wearing a tight-fitting cap. Another report, made some weeks later, described the gasser as being a female dressed as a man. The Gasser had also been described as carrying a flit gun, an agricultural tool for spraying pesticide, which he purportedly used to expel the gas.

Mad Gasser of Mattoon

Reported attacks

The first of the 1944 gasser incidents occurred at a house on Grant Ave., Mattoon, on August 31, 1944. Urban Raef was awakened during the early hours of the morning by a strange odor. He felt nauseated and weak, and suffered from a fit of vomiting. Suspecting that he was suffering from domestic gas poisoning, Raef's wife tried to check the kitchen stove to see if there was a problem with the pilot light, but found that she was partially paralyzed and unable to leave her bed.

Later that night (some contemporary accounts refer to the time as the morning of the following day), a similar incident was also reported by a young mother living close by. She was awakened by the sound of her daughter coughing but found herself unable to leave her bed.

The next day, September 1, there was a third reported incident. Aline Kearney, of Marshall Avenue, Mattoon, reported smelling a strong, sweet odor around 11:00 pm. At first she dismissed the smell, believing it to be from flowers outside of the window, but the odor soon became stronger and she began to lose feeling in her legs. Kearney panicked and her calls attracted her sister, Mrs. Ready, who was in the house at the time. Mrs. Ready also noticed the odor, and determined that it was coming from the direction of the bedroom window, which was open at the time. The police were contacted, but no evidence of a prowler was found. At around 12:30 am, Bert Kearney, Aline Kearney's husband (a local taxi driver who had been absent during the time of the attack), returned home to find an unidentified man hiding close to one of the house's windows. The man fled and Kearney was unable to catch him. Kearney's description of the prowler was of a tall man dressed in dark clothing, wearing a tight fitting cap. This description was reported in the local media, and became the common description of the gasser throughout the Mattoon incident. After the attack, Aline Kearney reported suffering from a burning sensation on her lips and throat, which were attributed to the effects of the gas.

Initially, it was suspected that robbery was the primary motive for the attack. At the time of the incidents, the Kearneys had a large sum of money in the house, and it was surmised that the prowler could have seen Aline Kearney and her sister counting it earlier that evening. Local newspapers incorrectly reported this incident as being the first gasser attack.