You may want to consider Jr. 2nd. Lt./3rd. Lt. Stephen Owens of Company G (D. J. Ward's CO), 5th. Regt. Miss. State Troops. (See 5th. Regt. (Robinson's) in this capsule history) - http://mississippiscv.org/MS_Units/minute_men.htm

This Stephen Owens was 38 years old when enlisted or drafted in Raleigh in August/1862. This unit did serve at Vicksburg and although there is no record of a parole in Vicksburg, he was noted as present during that time period.

1860 Smith County Federal Census

Name: Stephen Owens
Age in 1860: 37
Birth Year: abt 1823
Birthplace: Virginia
Home in 1860: Smith, Mississippi
Gender: Male

Household Members: Name / Age
Stephen Owens 37
Harriet Owens 38
Cornelia Owens 16
Mary A Owens 14
Caroline Owens 11
Leander Owens 9
James Owens 7
Sophrona Owens 3
George Owens 1
Julia Owens 5/12