Because selling common lands was a capital crime under Cherokee law, treaty opponents assassinated Boudinot, Major Ridge and John Ridge after the migration to Indian Territory. Stand Watie, Boudinot's brother, was also attacked but he survived. The assassins were never publicly identified nor tried in court. General Matthew Arbuckle, commander of Fort Gibson, claimed he knew their identities but never tried to arrest them. Some Cherokee, particularly those tied to the pro-treaty party, claimed that Chief John Ross knew about the assassinations beforehand. Many years later, Chief Ross's son Allen, wrote that this was not so. Allen's letter, is said to be in the possession of the Oklahoma State Historical Society. Afterward, there were years of violence between the two factions.