Did you note the part about the sheriff releasing two men from jail, telling them to slice Dumond?
My faulty memory had the sheriff going into Dumond's cell to do the deed himself. In actuality it seems he directed the deed to be accomplished by jail inmates he released.
You may have something else to offer up here, but it appears Dumond didn't do this to himself, and that the sheriff did by proxy.
This was quite a sordid tale wasn't it. Even his trial judge felt compelled to resign and work on his behalf. His wife stood by him until she died.
Then he get got pardoned and very likely committed some despicable crimes afterward.
Was he innocent of the rape? If so, what turned him? Was it prison?
I do appreciate the link.