I am helping a cousin (she is 96) with her husband's family.He was the son of Thomas J. Stepp.A letter she sent me indicates that John and Julia Annaliga "Henson" Stepp were his grandparents. Their parents were John Stepp and Nancy Rogers. She said that John got in a fight with a man he was working for and slit his throat.Then ran away and left his wife and son behind. The family always thought he went to Texas. (Passed down) This sounds like the same John that you have been tracking.
John and Julia lived and famred at Pittsburg Landing, TN (Battle of Shiloh)
Any help would be appreciated, feel free to e-mail.