Who is Thune’s Armed Services Personnel Staffer, John Costic & What are His Credentials Regarding USMCJ? Posted by constitutionallyspeaking on October 9, 2010 I hadn’t posted this as I have been waiting for the Thune staffer, John Costic, responsible for this reply to my request regarding Lt. Col. Terry Lakin. John has had a week to answer my questions regarding the reply he sent on behalf of Thune. I guess he thinks he is really clever. I’ll let you decide. Did Thune actually see the request or did Costic act independently regarding the grave situtation of Lt. Col. Terry Lakin,...