Only four cards in his file, no mention of him being a colored man. Nothing unusual about that. Here's another example :

Confederate Private John Hammonds, Co.E 5th ((McKenzie’s) east Tennessee Cavalry wrote to “a dear uncle” Feb. 10, 1862 from Knoxville. After speaking of their location and caring for comrades sick with the measles, he mentions a “small chunk of a fight” with the “Lincolnites ” two days before. “We killed six of them & taken one prisoner & wounded ten more. Jack Thomas a colored person that belongs to our company killed one of them.”

There is a record for a Jackson Thomas in Co.E but no indication of his race. Both men were killed at the Battle of Big Creek Gap in east Tennessee in March, 1863. According to Confederate records both men may have been killed after being wounded and captured.