An unlikely, and surely extremely rare, positive outcome from the “war on terror”: much better interrogation techniques.

In 2010, to make good on a campaign promise that he would end the use of torture in US terror investigations, President Obama announced the formation of the High-Value Detainee Interrogation Group, a joint effort of the FBI, the CIA, and the Pentagon. In place of the waterboarding and coercion that took place at facilities like Abu Ghraib during the Bush years, the HIG was created to conduct non coercive interrogations. Much of that work is top secret. HIG-trained interrogators, have questioned would-be Times Square bomber Faisal Shahzad and convicted Boston Marathon bomber Dzhokhar Tsarnaev. The public knows nothing about how those interrogations, or the dozen or so others the HIG have conducted, unfolded. Even the specific training methods the HIG employs—and that it has introduced to investigators in the Air Force, Navy, and elsewhere—have never been divulged. Since that first interrogation by Stearns and Marcia, Severino’s unit has conducted about 60 interrogations using HIG methods, he says—in cases involving human trafficking, murder, and terrorism. Severino has modified his interview room to be more welcoming and tries to have his detectives talk to witnesses and suspects as soon as they’re identified, to set the right tone for the interviews. “We make our living talking to people. And the HIG teaches us the best approaches—how to gain people’s trust.” By not single-mindedly seeking out confessions, Severino has found that he’s netted enough information from some suspects to amount to an admission of guilt.