Attorneys for Edgar Ray Killen filed a motion Monday in Neshoba County Circuit Court.
It requests that Killen be allowed to remain free on bond while he appeals his convictions for manslaughter.
Circuit Judge Marcus Gordon has not yet set a hearing date.
Meanwhile, Corrections Commissioner Chris Epps says officials have not yet classified Killen as a medium, or maximum-security inmate. He remains in isolation at Central Mississippi Correctional Facility in Rankin County.
Epps said there have been no problems with Killen since his incarceration.
The 80-year-old was convicted of three counts of manslaughter in the slayings of three civil rights workers in 1964. He was sentenced to the maximum sentence of 60 years.
The Associated Press contributed to this report.