I just read an article a couple of days ago of some guy who had a good idea where it might be in the Indian Ocean I believe... don't have the specifics handy....
It is just a version. The movie that I saw showed basically filigree and very well-planned and detailed work. Moreover, it had to be a pilot who knew Boeing 777 very well. It had to be one of the pilots, but tbh, the co-pilot had neither the experience nor the knowledge to do it. You can lock yourself in the cabin. There is a universal code to override it (known to the crew.) If Zaharie locked himself and had a heart attack, the co-pilot could still open the door, so they assumed the co-pilot tried to log in the universal code, but it was inactivated from inside.
