Unless otherwise noted, the following documents were first discovered by Sarah D., who posted them on LGF)
Interesting article from a 1994 issue of WestWord concerning the fight between Ward Churchil & friends vs. AIM (thanks to sbprice for the tip) One good quote (out of many): "There are hundreds, if not thousands, of good, sincere white people working with us. They just don't pretend to be something they're not."
While lambasting Churchill's ersatz "confederation of autonomous AIM" organization, the real AIM hints that Churchill is either an anti-Indian government agent, co-conspirator, collaborator, a pawn, or a dupe. AIM has, in fact, repudiated Churchill in no uncertain terms.
... and (thanks to LGFer zombie) here's a 1999 Indian Country Today article where Churchill is accused of being a cop.
International Indian Treaty Council's (IITC) letter to Churchill officially removing him and Glenn Morris from affiliation with the IITC:
...and Churchill's snidely pompous response:
AIM's editorial cartoon of Churchill
Brief but interesting discussion on NativeNet concerning Churchill's lineage