After walking through the thicket of Klansmen massed outside the courthouse, Mr. Louis testified in the murder of Emmett Till, a watershed moment in the civil rights movement.
Griffith, a welterweight and middleweight champion, fought professionally for 20 years. He famously won a 1962 bout in which his opponent died 10 days later.
Mr. Buck, a thin man who commanded the leashes of a half-dozen charges at a time, is considered the person who professionalized dog walking in New York City.