Just my opinion..
..but having run the KingAir's tanks dry (after it was refuelled in the owner's absence), one might have thought that he would thereafter be present and carefully witnessing future refuelling..but no sir... the NTSB say he arrived at the ramp long after the refuellling of the Premier.
Also, one wonders what sort of defect/distraction could contribute to, or cause, this accident. Just how much skill does it take to land an entry-level jet in VMC conditions?
Another tragic entry-level fatal. RIP gentlemen.