In all my dealings with him, I've always found Jeff Prather to be a decent, honorable person. So I'm really rather skeptical about this whole thing. It seems as if someone out there has an agenda against him or something.
Soke always says that undesirable people will be drawn away from the Bujinkan, and that's always proven to be the case. Note that Prather is still very much a part of the Bujinkan, and has been for decades.
I have to wonder whether some of this has been instigated by a guy named Dave Koss. Koss used to train in Highland and also in the Dayton dojo, and used to be very close to Jeff Prather. They even taught some classes together a few times at the Highland dojo, and Koss spoke very highly of Prather at the time.
However, every person Koss has ever had a falling out with (which is just about everyone he's ever met), suddenly becomes "weak, pathetic, evil", etc. And the rumors fly and the vindictive statements and lies spread.
I can't say for sure, but it would not shock me any if Koss was involved in this, as he's pulled stunts like this before. Koss makes politicians look like saints.