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The Mad Gasser of Mattoon

In 1944, residents reported a prowler spraying poison gas through windows. Victims felt paralyzed and nauseous. Police found nothing. Mass hysteria? Or was there really a mad gasser loose in Illinois?

August - September 1944
Mattoon, Illinois, USA
100+ witnesses

The Mad Gasser of Mattoon was a mysterious figure blamed for a wave of gas attacks in Illinois during 1944. Whether real criminal or mass hysteria, the case remains debated.

The Attacks

According to documented accounts:

Starting August 31, 1944:

  • Residents reported someone spraying gas through windows
  • Victims experienced paralysis, nausea, and dizziness
  • A sweet, flower-like smell was noted
  • Over two weeks, dozens reported attacks
  • The town was in panic

Typical Report

A common account:

  1. Victim awakens to a strange sweet smell
  2. Paralysis of legs or entire body
  3. Burning sensation in throat or lips
  4. Sometimes sees a shadowy figure
  5. Symptoms fade within hours

The Descriptions

Witnesses described:

  • A tall, thin figure in dark clothes
  • Sometimes wearing a tight cap
  • Seen fleeing the scene
  • Possibly carrying a spray device
  • Always escaped

Police Response

Authorities:

  • Patrolled extensively
  • Found no evidence of gas
  • Made no arrests
  • Eventually dismissed reports as hysteria
  • Some officers were reportedly gassed themselves

Mass Hysteria Theory

The favored explanation:

  • Initial report triggered copycat claims
  • Fear spread through the community
  • Physical symptoms can be psychosomatic
  • War-time anxiety contributed
  • Media coverage amplified panic

Evidence Against Hysteria

Some argue the gasser was real:

  • Physical evidence (cloth with odor) was found
  • Symptoms were consistent
  • Some victims had no prior knowledge of other attacks
  • A similar attacker operated in Virginia (1933-34)

The Virginia Connection

Before Mattoon:

  • A “Mad Gasser of Botetourt” operated in Virginia
  • Similar attacks in 1933-34
  • Same symptoms reported
  • Also never caught

What Was the Gas?

Proposed substances:

  • Chloroform
  • Ether
  • Chloropicrin
  • Carbon tetrachloride
  • If real, it was likely homemade

The End

The attacks stopped:

  • After police and media declared it hysteria
  • No arrests were made
  • The gasser, if real, was never identified
  • The town moved on

Cultural Impact

The case:

  • Is studied in psychology courses
  • Represents mass hysteria potential
  • Remains genuinely ambiguous
  • Influenced later “phantom attacker” theories

Sources