It will be interesting to see what the cause of this was. It'll look pretty bad if it was something that could have been prevented on a thorough pre-flight.

I'm not a King Air pilot but is visually checking the fuel levels in the tanks standard procedure on the pre-flight for that bird or are the wings too high off the ground without having a ladder? If it's normal and good procedure to visually check the fuel levels of a King Air and he cut that corner it just causes me to wonder if he has a habit of cutting corners during critical times, possibly contributing to this unfortunate accident...