Bill Cooper with Special guest Digger420!

Milton William "Bill" Cooper remains a polarizing figure for his accurate and dark predictions that include 9/11 and the steady rise of school shootings in the United States.

Dubbed "the grandaddy of conspiracy theories," Cooper correctly anticipated that the government would acknowledge the existence of UFOs amongst other chilling predictions.

Eight years before the Columbine Massacre, Cooper wrote extensively about the danger of school shootings and claimed the number of prescription medications given to children would elevate the risk.

And during a live broadcast of his radio show, The Hour of the Time in 2001, Cooper warned listeners that a catastrophe would befall the US that would spark war in multiple countries.

Mark Jacobson, who wrote the book Pale Horse Rider: William Cooper, the Rise of Conspiracy, and the Fall of Trust in America, spoke exclusively to The U.S. about Cooper's colorful life and beliefs.