There's audio recording out there (some say it's from Turkey bugging the consulate, some say it's from his Apple Watch which synced with his laptop that was in the car his fiancé was waiting for him in... and it synced when they were taking the pieces of him out of the embassy.
KSA has finally admitted he died in the consulate - they say a fight broke out and he was killed in the fight. I think that's a cover up for them planning to murder him, as they had a Saudi "diplomat" who was also a specialist in fucking autopsies (not a common skill for diplomats) to come dismember him.
They first cut his fingers off, while he was alive. Then the "diplomat" who took him apart, put headphones on and advised everyone else in the room to do the same... he then began to dismember the poor fucker.
Makes for good lyrics for a death metal song, for sure, but holy shit... so fucking brutal. KSA will likely remain fine after this is all cleared up... because as you say, they're rich as fuck from sitting atop the world's largest crude oil reserves. And since Iran hasn't been an ally for decades, we can't exactly turn to the second largest crude oil reserves.