Military personnel interviewed as a suspect by a MCIO are never told they are under arrest, but that’s the effect of the MCIO taking fingerprints, “mug-shots” and DNA.
Once “arrested” you become titled and that information goes into the federal data base.
Same if you are prosecuted, although the MCIO is supposed to update the information about you and your status.
Same for the results of a trial.
So, wait about six months after the final event in the case against you and go here:
Records inaccurate, give us a bell at 703-298-9562 or an eMail at firstname.lastname@example.org to discuss the possibility of a records correction.