An unsigned, one-page bombshell of a letter made the rounds at Kirkland & Ellis, the world’s largest law firm by revenue. It threatened havoc for the firm and others that did business before the most powerful bankruptcy judge in the U.S. The letter alleged that U.S. Bankruptcy Judge David R. Jones, chief of the bankruptcy court in Houston, was in a romantic relationship with Elizabeth Freeman, a Texas attorney who as Kirkland’s co-counsel helped the firm shepherd multibillion-dollar...