If you have an interest in fairness, justice and preventing wrongful convictions, then the new book "How the Police Generate False Confessions," by former Washington, D.C., homicide detective James Trainum is an important read. It takes you inside the interrogation room to see how investigators extract admissions from innocent people, and how the justice system can fix this persistent problem, seen in high profile cases such as the Central Park Five, the Norfolk Four and the teenaged suspect from Wisconsin in the Netflix series "Making a Murderer." It's a phenomenon that remains, understandably, incomprehensible to many. Someone "admits" to a...