From findagrave.com:
Enlisted as a Private in Company D,35th Georgia Infantry on September 23,1861.Shot twice at the Battle of Mechanicsville,Virginia on June 26,1862.Wounded and captured at the Wilderness,Virginia on May 5,1864.Died while in prison at Elmira,New York of acute bronchitis in May 1865.

Burial:
Woodlawn National Cemetery
Elmira
Chemung County
New York, USA
Plot: Grave 2756

Family links:
Spouse:
Nancy A. Scogin Rigby (1822 - 1897)*

There's a picture of his grave and a picture of him with a bowie (I think) knife.

Good luck in your search!