Murder is one of the most venerable subjects of journalism and drama. What was it about the O.J. trail that still entertains? On The Gist. reporter Jeffrey Toobin explains the case’s lasting significance. He’s the author of The Run of His Life: The People v. O. J. Simpson. For the Spiel, let’s dispel with this fiction that Marco Rubio doesn’t know what he’s doing. Today’s sponsor: Betterment, the largest automated investing service—managing billions of dollars for people just like you. Get up to six months of investing free when you go to Betterment.com/gist. Join Slate Plus! Members get bonus segments, exclusive member-only podcasts, and more. Sign up for a free trial today at slate.com/gistplus.