Dr. Cyril Wecht distrusts the US government. And he’s proud of it. The forensic pathologist — who declared in 1978 that Lee Harvey Oswald did not act alone in assassinating President John F. Kennedy — is now 90 and still sticking to his story. Wecht’s latest book, “The JFK Assassination Dissected” (Exposit Books), summarizes his six decades of research into the subject, and pokes holes in the conclusion made by the seven-man Warren Commission that Oswald, without any help, shot and killed Kennedy when his motorcade drove past the Texas School Book Depository in Dallas on Nov. 22, 1963. “Young...