How William Cooper and his book ‘Behold a Pale Horse’ planted seeds of QAnon conspiracy theory

EAGAR, Ariz. — When authorities killed William Cooper in a burst of gunfire outside his hilltop home in eastern Arizona, he was an author and radio host who had attracted a rabid following among UFO buffs, prisoners and the militia movement.
For them, his book, “Behold a Pale Horse,” and nightly shortwave radio show lifted the veil on how the world actually works.
Through his death in 2001, Cooper’s legacy was cemented.