Doing some further digging into the Harshbargers and the incident involving Hugh Brown I think you can add him to your list of strange murders in Greene and Dade County in 1863.

Hugh Franklin Brown killed August 10 1863 at his home.

His brother-in-laws were reportedly killed in unusual circumstances by family lore by "Quantrill Bushwackers" both at Bois D'Arc, Greene Co. MO
Andrew Jackson Carter died February 20, 1862
John Carter died February 01, 1862.

John R.