Kid McCoy
Charles "Kid" McCoy, original name Norman Selby (October 13, 1872 - April 18, 1940) was a world champion boxer.It is thought that the expression "the real McCoy" originally referred to him.
He died from an overdose of sleeping pills. His suicide note read, among other things: "Everything in my possession, I want to go to my dear wife, Sue E. Selby... To all my dear friends...best of luck...sorry I could not endure this world's madness."