Jeez... I just posted a similar thread but you must've beaten me to it. Sad news as I have a few friends who fly for Borek, one of them on the King Air... I hope it wasn't him who was fatally injured.
It's horrible that something like this should happen. Let's wait for the official investigation to come out before we speculate. Meanwhile, my condolences to the family of the deceased and a speedy recovery to the injured members of that flight.