How many men were killed as a result of the massacre as noted in the nonfiction book, Unspeakable: The Tulsa Race Massacre?

Thirty armed Black men went to the jail where the accused 19-year-old was being held because an article in a White-owned newspaper indicated the Whites should try to harm the man. In the end, ten White men and two Black men were killed when 1,000 armed White men met the Blacks at the jail.