Col. David “Wil” Riggins, after a highly decorated Army career that included multiple tours in Iraq and Afghanistan, was on the verge of promotion to brigadier general in July 2013 when he got a phone call at the Pentagon from the Army’s Criminal Investigative Division to come in for a meeting. Once there, he learned that a blogger in Washington state had just accused him of raping her, when both were cadets at West Point in 1986. An investigation was underway.Then, Riggins sued Shannon for defamation, claiming that every aspect of her rape claim on the West Point campus was...