I think the information you have discerned comes up with the scenarios to answer or not answer these questions as might be desired for accomplishing objectives.
No body, no talkative witnesses, follow-up report in due course, those in China and Japan who let the word out too early have reached understanding, Geraldo picking up dropped 'nuggets' from the massive investigation that is just beginning.
It's all in the 'timing', much like the stock market.