Miigwetch Waab for your thoughts on this matter. 
I would hope that if Joseph has been stretching the truth about his ancestry that he comes clean. I would accept that as being the best thing for him and everyone else in the circle. It would not satisfy all but it would change him for the better and lighten his load.
It would lighten the load of all who stand in the circle. We need allies...the Earth needs allies...we no longer have the luxury of time to point fingers and argue among ourselves..there is far too much to do...the window of opportunity is open...we need to heal...the Earth needs to heal..we know how to help Her but we can not do that by constantly cutting ourselves and potential allies to ribbons.
What ever path Joseph chooses will be his own. I can not make up his mind . 
I can put his shoes on and walk in them but that is not the same thing as him walking in his shoes. 
For all o us who can let 's go into the sweat and let go of this.
Forgive, learn and move on.