 Hill, along with Secret Service agents Kellerman, Greer, and Rufus Youngblood, provided testimony to the Warren Commission in Washington, D.C. on March 9, 1964.Hill grabbed a small handrail on the left rear of the trunk, normally used by bodyguards to stabilize themselves while standing on small platforms on the rear bumper.According to the Warren Commission's findings, there were no bodyguards stationed on the bumper that day because