The Trump investigations are everywhere. This week we move from Mar-A-Lago to New York, where the Attorney General had some questions for the ex-president. He took the Fifth, repeatedly if unsurprisingly. We look at it, but to do so we look at the Fifth Amendment itself, its roots going back millennia, and its evolution as American law. So you think you know the Fifth? We beg to differ. Prepare for an entirely new way to think about this venerable protection, as Professor Amar offers a framework that will provoke, surprise, and hopefully, delight.