The Mad Gasser of Mattoon

In the late summer of 1944, as World War II raged overseas and American communities lived under constant anxiety, the small city of Mattoon, Illinois experienced a terror of its own. Residents reported a prowler who moved through the night, spraying some kind of poison gas through bedroom windows. Victims described waking to a strange sweet smell, then finding themselves paralyzed, nauseated, unable to move or cry for help. For two weeks, the Mad Gasser of Mattoon dominated local headlines and had citizens too frightened to sleep. Then, almost as suddenly as it began, the attacks stopped. The gasser was never caught. Whether he was real or merely a phantom born of wartime fear remains debated to this day.

The Attacks Begin

According to documented accounts, the first reports emerged on August 31, 1944. A Mattoon resident awakened in the night to a strange, sweet, flower-like odor filling her bedroom. As she tried to rise, she discovered her legs would not move. Paralysis had seized her lower body. She managed to call out, and her husband investigated, but by the time he reached the window where the smell seemed strongest, nothing remained but the fading scent.

Within days, similar reports flooded the Mattoon police department. Residents throughout the city described virtually identical experiences: awakening to a peculiar sweet smell, experiencing partial or complete paralysis, feeling burning sensations in the throat or on the lips, and occasionally glimpsing a dark figure fleeing from the window. The symptoms typically faded within a few hours, leaving victims shaken but physically unharmed.

Over approximately two weeks, dozens of Mattoon residents reported attacks. The town descended into panic. Citizens armed themselves, formed vigilante patrols, and refused to sleep with windows open despite the late summer heat.

The Phantom Attacker

Witnesses who caught glimpses of the supposed attacker described a tall, thin figure dressed in dark clothes, sometimes wearing a tight-fitting cap. He carried what appeared to be a spray device or pump, the presumed delivery mechanism for the mysterious gas. He moved quickly and silently, always managing to escape before anyone could apprehend him or get a clear look at his face.

The consistency of these descriptions added to the terror. Multiple independent witnesses reported the same figure, suggesting something real was stalking Mattoon’s streets rather than mere imagination or coincidence.

The Investigation

Mattoon police launched an extensive investigation, patrolling residential areas throughout the night and responding to every report. They found no conclusive evidence of any attacker. No gas was detected at alleged attack sites. No one was arrested. The investigation produced frustration rather than answers.

Remarkably, some police officers themselves reported being exposed to the gas while investigating complaints. If these accounts are accurate, they suggest something genuinely anomalous was occurring, as experienced law enforcement officers would be expected to distinguish between real chemical exposure and psychosomatic symptoms.

Eventually, authorities reached a controversial conclusion: the attacks were mass hysteria, a psychological phenomenon rather than criminal activity. Police declared there was no gasser, and local newspapers followed their lead, ceasing sensationalized coverage of new reports.

The Hysteria Theory

The mass hysteria explanation has become the accepted mainstream interpretation of the Mattoon events. According to this view, an initial report, perhaps based on industrial fumes or some other mundane exposure, triggered a cascade of copycat claims. Fear spread through the community, amplified by wartime anxiety and vivid newspaper coverage. Physical symptoms that can be produced psychosomatically, including nausea, dizziness, and even temporary paralysis, manifested in frightened residents who expected to experience exactly those symptoms.

The theory gains support from the pattern of the attacks, which spread rapidly once initial reports were publicized, and from the abrupt cessation once authorities declared the phenomenon to be hysteria. If a real attacker existed, his sudden disappearance after police dismissed his existence would be remarkable coincidence.

Evidence for Reality

Those who believe the Mad Gasser was real point to several troubling facts. Physical evidence was reportedly found at some attack sites, including a cloth that bore an unusual chemical odor. The symptoms described by victims were remarkably consistent even among people who had no opportunity to learn details of previous attacks before their own experiences. Some victims reported attacks before reading about the phenomenon in newspapers.

Most significantly, a similar series of attacks had occurred in Botetourt County, Virginia, in 1933-34, a decade before the Mattoon events. The Mad Gasser of Botetourt exhibited the same pattern: nighttime attacks, mysterious gas, paralysis and nausea, a figure seen fleeing. That case also went unsolved. The existence of a previous, geographically distant gasser suggests the phenomenon might not be purely psychological.

The Unknown Gas

If the gasser was real, what substance did he use? Various candidates have been proposed: chloroform, which can cause disorientation and unconsciousness; ether, with its sweet smell and anesthetic properties; chloropicrin, a chemical weapon that causes severe irritation and nausea; or carbon tetrachloride, which produces similar effects. A determined individual with basic chemistry knowledge might have created a homemade compound combining various accessible substances.

The sweet smell consistently reported by victims suggests certain compounds over others, though positive identification of an unknown gas from decades-old witness descriptions is essentially impossible.

The Aftermath

The attacks ceased after mid-September 1944. Whether the gasser, if real, was frightened off by increased vigilance, achieved some unknowable goal, or simply moved on to other activities cannot be determined. Mattoon gradually returned to normal life, though the memory of those terrifying weeks never entirely faded.

The case has become a standard example in psychology courses studying mass hysteria and social contagion. It demonstrates how fear can spread through communities and how psychological expectations can produce physical symptoms. Yet it also demonstrates the limits of the hysteria explanation, as the evidence for a real attacker, while not conclusive, is stronger than such explanations typically allow.

In Mattoon, Illinois, the windows have been closed for generations against the night air. Perhaps the Mad Gasser was never real, merely a phantom conjured by wartime fear and provincial isolation. Or perhaps he was real, and somewhere in the darkness of 1944, he accomplished whatever strange purpose brought him to a small Midwestern city with a bottle of gas and an unknowable intent.

Sources

• Wikipedia search: “The Mad Gasser of Mattoon”
• Chronicling America — Historic US newspapers (1690–1963)