Frederic Nathan was a Special Agent of the FBI.
In 1947, Nathan was assigned to investigate a UFO sighting by Kenneth Arnold. Alongside Douglas Milford, Nathan interviewed Arnold on July 12.[1]
On July 30, Arnold contacted Nathan and Milford, informing them of a meeting with Harold Dahl and Fred Crisman, who possessed metallic fragments dropped by a UFO. Nathan and Milford sent Military Intelligence investigators Captain Davidson and Lieutenant Brown to meet Arnold in Tacoma.[1]