Sadly, Otto, 22, died without regaining consciousness — or being able to name his killers — in a Cincinnati hospital less than a week after being released by
North Korea, where he had spent 18 months in captivity. But retired U.S. Army Lt. Col. Tony Shaffer believes Otto was repeatedly shot full of mind-numbing drugs like sodium pentothal, which leaves no physical marks. The crippling concoctions reduce victims to a zombie-like status, and the savaged youth never woke from his trance.