Small planes crash every day for a large variety of reasons and some seem to crash for no reason at all. That isn't the case of course. It simply means that the investigators are unable to determine the cause.
That may be the case with the Wellstone crash.
No sabotage, no conspiracy, just a cause that cannot be determined. Just like other crashes. It could be wind sheer, contaminated fuel, a broken control cable, the pilot had a heart attack, any one of a number of things.
As I said, no sabotage, no conspiracy.

troll