WASHINGTON — On the morning of May 11, 1966, U.S. Supreme Court Justice Byron White called FBI Director J. Edgar Hoover’s top assistant, Cartha “Deke” DeLoach, with a special request.

Could he come by with friends for a special tour of FBI headquarters? The answer was an immediate yes, and early that afternoon, White showed up at the FBI’s D.C. headquarters with two of his law clerks and a college-aged male friend from California.