Marine Maj. Mark Thompson faces new charges in his sexual misconduct case. The former Naval Academy teacher is accused of lying in his effort to prove he did not have sex with two female midshipmen. (Nikki Kahn/The Washington Post)

A week-long trial for Marine Maj. Mark A. Thompson — the former U.S. Naval Academy instructor who has insisted he was falsely accused of having sex with two students — is scheduled to begin early next year.

Thompson was formally arraigned Monday on charges of making a false official statement and conduct unbecoming an officer and a gentleman. His court-martial is set to start Jan. 9 at Marine Corps Base Quantico. It will determine whether Thompson is dismissed from the service and stripped of his retirement benefits.

Thompson has long sought to prove that he was unfairly convicted of sexual misconduct at a 2013 court-martial. The military launch­ed a new investigation into Thompson after The Washington Post uncovered evidence that he was dishonest when he testified before an administrative board deciding whether he should be kicked out of the Marines.

In April, the military charged Thompson with lying to the panel of three Marines who reviewed his case, encouraging a friend to lie for him and lying to a Post reporter about his accusers to try to prove his innocence.

The prosecutor for the Marine Corps, Maj. Babu Kaza, indicated to the judge Monday that he does not intend to call Post reporter John Woodrow Cox as a witness at the trial.

The Post published an audio recording this month of Cox’s 45-minute interview with Thompson, in which the reporter showed him copies of text messages he uncovered that suggested Thompson was involved in a sexual relationship with a female midshipmen.

Thompson’s attorney, Kevin B. McDermott, referenced the recording of the interview in court Monday. He said he may seek additional records and information from The Post related to the interview, according to Marine spokesman Rex Runyon.

McDermott did not return phone or email messages seeking comment Monday.

A pretrial hearing is scheduled for September.