Cavett Robert

As a kid, I watched 'Bugs Bunny' cartoons, and for some reason Pepe Le Pew, the indomitable French skunk pursuing his would-be kitty paramour, left his mark on me: became an instant emblem of odoriferous hubris, hedonistic bad behavior. He was an entry-level Dominique Strauss-Kahn, a rookie Marquis de Sade.

On a foggy, steel gray Saturday in September 2002, Bennet Omalu arrived at the Allegheny County coroner's office and got his assignment for the day: Perform an autopsy on the body of Mike Webster, a professional football player.