To the PC deniers of Cherokee slaveholders, an article by NPR (recent) that the Cherokee want to expel families of former slaves (that they owned, BLACK) from the tribe.
http://www.npr.org/2011/09/19/140594124/u-s-government-opposes-cherokee-nations-decision
The Cherokee documents where they finally sided with the confederacy are interesting in that regard- the reasons they cite for joining the confederacy include the fear that slavery would be outlawed.