An investigation is underway by the Bi-Partisan Investigative Committee on Privacy Protection.
The controversy in the legislature stems from the Missouri Department of Revenue forwarding records of people who have carry-conceal permits.
The Investigative Committee voted to issue subpoenas to six Nixon employees this week.
Nixon has said in the past that state and federal laws have been followed.
Copyright 2016 Nexstar Broadcasting, Inc. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.