Here's a little more, filling in the blanks from Lee's Colonels. Died 11/19/1912. Buried in the Glenville Cemetery in Glenville, Panola Co., Mississippi. I have pictures of his gravestone and will share if you want them.

Here's an address to a photograph and short bio.
http://www.rootsweb.com/~ms19inf/Dean.htm

I haven't found any indication of his being captured in 1864. Can you share that with me? Thanks...