Yes, ma'm, he was also killed that day in the events described in the other replies. My source is also mentioned in those replies, James F. Thoma's 2003, "This Cruel Unnatural War," self-published by the author in Kingsport, Tennessee, where I hear he lives yet.

Thoma lists as his sources:
--the 1919 Cooper County history published by the Historical Publishing Company of Topeka (which barely mentions your ancestor);
--United States Government, "War of the Rebellion: Official Records of the Union and Confederate Armies," series 1, vol. 41, part 3, page 58 (which also does not name your ancestor, but mentions the guerrillas killed some local men in interior Cooper County about that time); and
--"Pilot Grove Centennial, 1873-1993," Marceline, Missouri: Walsworth Press Company Inc., 1973.

Kathy, I would assume by elimination that the details I give below James Thoma obtained from his third listed source, the centennial history of the community of Pilot Grove. I quote from Thoma's book on page 106, so you can have what I have:

"The Deaths of John Diel, Leopold Vollmer, and Captain Davis: Leaving Tipton, Todd's blood-spattered party of bushwhackers headed towards Boonville. On their way to Boonville they again passed the Pilot Grove community where they killed two citizens. Murdered was John Diel who was shot as he was holding his little daughter's hand. Diel evidently mistook the bushwhackers for Federal troops as they were dressed in blue. Also murdered was a Leopold Vollmer who looked out his door to see what was going on and was immediately shot. It was also at this time and George Todd decided that there was no longer value in keeping Captain H. D. Davis hostage; and summarily executed him."

Thoma, in his footnote about the death of Leo Vollmer, said "Vollmer's tombstone notes that he was killed by bushwhackers while rocking on his porch."

Thoma also composed a long, detailed Appendix A: A Compilation of Cooper County Citizens Who Served During the Civil War, that listed the Union service of August Diehl, Jacob Diehl, and Valentine Diehl, although these three men served in different companies in the Cooper County area. For Jacob Diehl it says he was a private in Company H, 52nd Enrolled Missouri Militia enrolling on 14 August 1862 (at the onset of the EMM program in Missouri) in Boonville and discharged on 08 Dec. 1862. Notes: In 1862 he was a 42-year-old native of Germany living in Clear Creek Township. (The business about being discharged means that Jacob was entered upon active duty probably in Boonville as he enrolled on 14 August 1862 and served on active duty until he was discharged on 8 December 1862. He may have performed other periods of duty in this unit, because enrolled men remained part of their units until the program was disbanded with the return of peace in March 1865. Of course, Jacob was killed long before that.).

I will give you background about why Todd's band was so ferocious with their raiding in Cooper County, as they also killed a couple other German-American men in central Cooper County on their way to raid Tipton. On Friday, August 30 the band was camped not far from present-day Bunceton in central Cooper County and sent some of their men out to forage for feed for the horses and food for the men. Local German-Americans who were members of the militia shot up one of the pairs of guerrillas sent on this mission. The adult, Bill Greenwood, suffered a leg wound and probably recovered, but the boy Riley Crawford--age 16--was mortally wounded in the bowels. The year before, Riley's mom brought the boy to Quantrill after Kansas jayhawking raiders killed his father, and she asked Quantrill to train the teenager to avenge the family against the Yankees. Riley Crawford was a favorite of the bushwhackers because he had a positive attitude and did his chores without complaint and held up to the rigorous guerrilla war without a wimper and better than many grown men. Little Riley took many hours to die of his wound, and his comrades in the band were horrified to watch the boy suffer that way for so long before he succumbed to the wound. Frankly, they wanted revenge against the local German-American militiamen and had little way to distinguish which German-Americans were militia and which were not in the haste of their riding back and forth and keeping moving to avoid pursuing Union cavalry.

I hope that helps fill in the gaps for your family.

Bruce Nichols