Maury Island Donut UAP Debris Incident

On June 21, 1947 — three days before the Kenneth Arnold sighting — harbor patrolman Harold Dahl reported observing six large donut-shaped objects hovering over Puget Sound near Maury Island. One of the objects appeared to malfunction and ejected two types of material: a white metallic foil and a darker slag-like substance. The debris damaged Dahl's boat, injured his son, and killed his dog. Dahl collected samples and reported the incident to his supervisor, Fred Crisman. Army Air Force intelligence officers Captain William Davidson and Lieutenant Frank Brown flew to Tacoma to collect the material. Their B-25 crashed on the return flight to Hamilton Field — both officers died. The FBI investigated the crash and the original incident. The recovered debris was analyzed at Wright Field but results were classified. The case remained one of the first documented instances of recovered UAP-associated physical material in the official record.