William "Billy" Allen Harper - On November 22, 1963 he was a Texas Christian University medical student who after the assassination of President John F. Kennedy, Harper discovered a large piece of President Kennedy's skull bone (referred to as the "Harper fragment") in the grass to the left and forward of President Kennedy, south of Elm Street.

After discovering the "Harper fragment" on 11-23-63 at 5:30 PM CST, Harper gave the skull piece to his uncle, Jack C. Harper, a medical doctor at the "Methodist Hospital" of Dallas. The same day Jack gave the skull piece to A. B. Cairns, a medical doctor and Chief Pathologist of "Methodist Hospital." On 11-25-63 Cairns gave the skull piece to F.B.I. Special Agent James W. Anderton, who notified his F.B.I. superiors in Washington D.C., who ordered that the skull fragment be sent for examination at the F.B.I. laboratory in D.C.

Harper has diagramed where he found the skull piece. The found location was 117' forward of the President's Z-313 head explosion location, to the left side of the limousine, but, to the right side of President Kennedy's facing direction.

A theorized straight-line flight path of the "Harper fragment," back through the President's street point location at Z-313, continues behind the president and intersects the west side of the sixth-floor depository windows -not the Warren Commission eastern-most snipers lair- where, just minutes before the assassination a Warren Commission witness, Arnold Rowland, testified that he observed a second rifle-armed assassin standing with the weapon held at a military-like "port arms" position through a sixth floor west window. (just minutes after the assassination, Rowland voluntarily approached a Dallas police detective and volunteered that he had seen a second rifle armed man in the sixth floor west window). By 1:15 PM CST Rowland also told secret service agent in charge of the motorcade Forrest Sorrels that he had seen two armed men on the sixth floor of the depository.

William Harper was never called by the Warren Commission to testify.