Since I live in Coffee County I have always heard the story of Calvin Brixey. Many have speculated on who captured him. Accidentally, I ran across the answer while reading "The History of the 53rd Regiment Alabama Volunteer Cavalry by Robert G McClendon, Jr.
It seems that during Wheelers raid he had formed a special unit of scouts under the command of Capt. Peter Mastin. There were a total of 60 hand picked scouts for Cavalry scouting duty screening the flanks of Brig Gen. John Kelly's forces. After capturing and destroying the stores at McMinnville ,Tn. on Sept 1st he was given orders to proceed toward Tullahoma, Tn. and then make his way back to rejoin his command at Franklin.
"From there ( McMinnville), he proceeded towards Tullahoma, capturing the Attorney General of the State of Tennessee, on picket on one of the pikes and came upon a company of Tennessee Home guards just before daylight, capturing the whole concern." page 235. ( from the personal papers of Capt. Peter B Mastin Jr., Commanding Kelly's Scouts.)
The date of the capture and the subsequent execution of Brixey leave little doubt now as to who captured Captain Brixey.
After General Kellys death at Franklin the Scouts were disbanded