William J. "Big Bill" Craig (November 21, 1855 – September 3, 1902) was among the first agents of the United States Secret Service tasked with protecting a President of the United States.[1] He was also the first of only two Secret Service agents who have ever been killed in the line of duty while protecting an American president, the other being Leslie Coffelt.[2][3][4] Before protecting presidents, Craig was known for teaching and exhibiting use of the broadsword, as well as for his work apprehending counterfeiters.