I wrote about this on page 138 of a recent work.
Edwards took some short cuts to claim 1LT Joseph M. Stret of Company A, 9th Cav MSM murdered James Holtzclaw outright--and that may have been the truth. We will never know for sure, as we only have Street's word for what happened. 1LT Street at Fayette, Howard County, received word in about late August 1863 that Captain Clifton Holtzclaw had abducted disabled former Private Sanford Bullock, formerly of the 9th. Street and patrol went to Jim Holtzclaw's house, took the old man into custody presumably to make him take them to his son's hideout, and "accidentally" shot the old man in the head while trying to convince him to help them. I could not find out what happened to Holtzclaw's prisoner Bullock, but Holtzclaw's commander of this period, Colonel Sidney D. Jackman, in his memoirs wrote that he had a spy named Bullock killed about this time.
Do I personally think that Street murdered the old man in anger over the kidnapping of one of his former soldiers? Yep, but that's only my opinion.
Beside my humble work, references include:
--"Sad Accident," "Howard County Advertiser, Fayette, Howard County, 3 Sept 1863, repeated in "Missouri Statesman" of Columbia, Boone County, 11 Sept 1863;
--Edwards, "Noted Guerrillas," p. 304;
--State of Missouri, Sec'y of State's Office, MO State Archives, military service record of Private Sanford Bullock, 9th Cav MSM;
--Norton, "Behind Enemy Lines: The Memoirs and Writings of Brigadier General Sidney Drake Jackman," Springfield, MO: Oak Hills Publishing, 1997, pp. 175-76.
There may be more on this, but that is all I could find.