John Alva Keel, born Alva John Kiehle (March 25, 1930 – July 3, 2009) was an American journalist and influential UFOlogist who is best known as author of The Mothman Prophecies. In 1967, Keel popularized the term "Men In Black" in an article for the men's adventure magazine Saga, entitled "UFO Agents of Terror". According to Keel, he initially sought to explain UFOs as extraterrestrial visitations, but later abandoned this hypothesis. His third book, UFOs: Operation Trojan Horse, published in 1970, linked UFOs to supernatural concepts such as monsters, ghosts and demons. Keel used the term "ultraterrestrials" to describe UFO occupants he believed to be non-human entities capable of taking on whatever form they want. His 1975 book, The Mothman Prophecies was Keel's account of his investigation into alleged sightings in West Virginia of a huge, winged creature called "Mothman." The book combines Keel's account of receiving strange phone calls with reports of mutilated pets and culminates with the December 15, 1967, collapse of the Silver Bridge across the Ohio River. The book was widely popularized as the basis of a 2002 film of the same name starring Richard Gere. Prolific and imaginative, Keel was considered a significant influence within the UFO and Fortean genre. Keel lived for many years in the Upper West Side of New York City. He was a bachelor. He died on July 3, 2009 in New York City, at the age of 79.

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