TPMMuckraker has a very helpful piece here concerning the current status of the Lakin case. The piece quotes a statement from Walker Reed Army Medical Center spokesman Chuck Dasey including the following information:
Following the preferral of charges, and service of the charges on LTC Lakin, the Medical Center Brigade Headquarters Company Commander forwarded the charges to the Acting Medical Center Brigade Commander with a recommendation to dispose of the charges at a General Court-Martial. The Acting Medical Center Brigade Commander, in her capacity as the Summary Court Convening Authority, directed the appointment of an Article 32, UCMJ pre-trial investigation to inquire into the truth of the matters set forth in the charges and to secure information to determine what disposition should be made of the case in the interest of justice and discipline.
The date for the Article 32 investigation has not been set. Upon receipt of appointment orders, The Article 32 Investigating officer will establish a hearing date.
The TPMMuckraker piece also includes this quote from LTC Lakin issued in a press release today from the American Patriot Foundation:
I invited my court martial, and today I stand ready to answer these charges. I was prepared to deploy if only the President would authorize the release of the proof of his eligibility. He refused, and now the court will determine the issue, and my fate. The constitution matters. The truth matters.