Indians owned black slaves, too.
Chief James Vann had over 100 slaves and his son, Chief Joseph Vann, had over 200 slaves. A docent at the Chief Vann House told the story of James Vann in a drunken rage “… burning alive his Negro, Isaac, who had helped rob and tried to kill him.”
This pamphlet has an entry from the diary of the nearby Moravian Missionaries (at the Cherokee Capitol at New Echota).
For example, the missionary records of January 29, 1813, talk of a slave named Mima who was whipped by the new overseer on the Vann plantation to the point of near death.
Chief James Vann was known to be exceptionally cruel. The pamphlet also relates the many escape attempts of the slave named Isaac that he later burned to death.