On June 21, 1947, Dahl was salvaging orphan logs at Puget Sound Harbor near Maury Island alongside his son Charles and the family dog. Upon spotting six unidentified aircraft, they traveled to shore, from where Dahl observed the aircraft through binoculars and took several photos. He observed that one of the aircraft appeared to be damaged and it eventually exploded, dropping both metallic and rock-like debris that burned his son and killed the dog. The other flying objects recovered the sixth and disappeared. Dahl collected samples of the debris and gave them and his camera film to his supervisor, Fred Crisman.
On July 30, Dahl met with Crisman and fellow UFO witness Kenneth Arnold at the Winthrop Hotel. The following morning, Dahl was confronted by a man in a black suit, claiming to be investigating the Maury Island incident. Although the man presented no credentials, Dahl believed him to be affiliated with the FBI.
Dahl accompanied the man to a nearby coffee shop, where the man described the Maury Island incident in precise detail, further stating that Dahl "was not supposed to see" it. He further elaborated that, for the safety of Dahl's family, he should not speak of the incident in the future, except to say that it was his own work of fiction. The man then drove Dahl home, where he discovered Charles to be missing.
Five days later, Charles allegedly called Dahl from a motel in Missoula, Montana with no recollection of how he got there. Dahl later moved away from Tacoma and, until his death in 1982, maintained that the Maury Island incident was a hoax.
Behind the scenes
Harold Dahl was an alleged harbor patrolman who, along with Fred Crisman, claimed to see six donut-shaped flying objects that dropped debris that broke a worker's arm and killed a dog. Dahl further claimed that he was approached by a man in a dark suit who ordered him to not talk about the incident.
The FBI concluded the incident to be a hoax motivated by making a profit with the Chicago-based Fantasy Magazine.
- The Secret History of Twin Peaks (Mentioned only)