I agree that it could, but I feel like this might be one of those situations where you just have to choose between very imperfect alternatives. If you use techn

I agree that it could, but I feel like this might be one of those situations where you just have to choose between very imperfect alternatives. If you use techniques like this, you might get wrong information. If you don't, you might get no information at all. Maybe sometimes it's better to get very unreliable information and try to confirm it independently, the classic example being if they say something only the killer would know like where the body is buried.