jet that seemingly disappeared into thin air with 239 people on board. a high-ranking malaysia military official, the ones conducting the investigation, is now confirming flight 370 went hundreds of miles off-course before it went offradar. reporter: conflicting information continues to come from the malaysians, while the plane s dramatic route changes come under more scrutiny. is there any chance, mike, that these were confused pilots? i don t know what may have happened to shut off the transponder, but they thought when they made the u-turn that they were going the direction they were meant to be going? that would be lottery odds, i suspect. those pilots with their expertise or their experience, no, there was something that caused that airplane to turn and go south. reporter: day five, a wednesday. we learn the final words from the cockpit were a seemingly calm, all right. good night. no mayday call was ever issued. concerns grow that this was deliberate. i think as cia d