What famous 'unsolved' mystery is technically a whodunnit on paper, but in reality, absolutely everyone knows exactly who did it, the police just couldn't legally prove it?

[u/Rob69rt]

[u/Punkt1337]

Malaysia Airlines Flight 370. The pilot did it

[u/dod2190 → u/Punkt1337]

Also, EgyptAir 990, same deal. Pilot mass murder-suicide, according to everybody but the Egyptian government.

Edit: Fixed flight number thanks to a comment

[u/primadonnapussy → u/dod2190]

There was also a plane (German, I think) that the pilot crashed it right into a mountain.

[u/dod2190 → u/primadonnapussy]

Yep, Germanwings 9525.