It looks like it was headed fo Gan International airport in Maldives
The pilot flipped out. He killed the copilot, turned off reporting systems, pulled circuit breakers and ascended to 45k ft. to kill everyone in back, (the masks didn’t drop because system breaker was pulled). Flight/voice recorders store the last 2 hrs. of data, pilot has no control over that, breakers not located in flight deck so he flies for hours to overwrite data and dumps the aircraft in the deep remote Indian Ocean.
That’s what I think happened.
Another thread has an individual on Maldives seeing a low flying airplane that morning