So reviewing known of the members of the 48th Arkansas, there is one POW captured in White County, Arkansas on 14 Aug 1864 just before Price's Raid,

PICKENS, DAVID F. - PVT - C - Captured in White Co, AR 14 Aug 1864

There is one POW captured at Pilot Knob on 27 Sep 1864 at the beginning of Price's Raid

WALKER, W.B. - PVT - D - Captured at Pilot Knob, MO 27 Sep 1864

There are six POW's captured at Mound City, KS on 24 April, at the end of Price's Raid

BEARD, LEWIS - PVT - G - Captured 24 Oct 1864 at Mound City, KS. Died 7 ? 1864 of rubela at Alton, IL
BURNES, ANDREW J. - PVT - F - Captured 24 Oct 1864 at Mound City, KS..
CHRISTWELL, DAVID - PVT - A - Captured 24 Oct 1864 at Mound City, KS. Died 12 Mar 1865 of pneumonia at Alton, IL #1913
JONES, THOMAS S. - PVT - B Captured 24 Oct 1864 at Mound City, KS
PORTER, URIAH - PVT - G - Captured 24 Oct 1864 at Mound City, KS
QUATTLEBAUM, PHILIP - CPL - G - Captured 24 Oct 1864 at Mound City, KS

And there are apparently three POW's captured in White County after the raid.

QUERY, SMILEY P. - PVT - G - Captured 11 Nov 1864 in White Co, AR

Bolton, Benjamin W. Capt. G - Reported captured by Major Harris S. Greeno, of the 4th Arkansas Cavalry (U. S. Army), Greeno says he captured Bolton and two of his men on 13 November 1864.
Unknown Soldier from Company G. Major Harris S. Greeno, of the 4th Arkansas Cavalry (U. S. Army), at the same time Bolton was captured.
Unknown Soldier from Company G. Major Harris S. Greeno, of the 4th Arkansas Cavalry (U. S. Army), at the same time Bolton was captured.

Greeno had reported the capture of three members of Coleman's command on the 11th, which I think would include PVT QUERY listed above.

Are there anymore 48th Arkansas Soldiers that can be identified?