Was it an arrest at all? Or a stunt to promote the Shadowgate documentary?
If the arrest concerned classified material, MW would have been arrested by the Feds.
According to this round up on RT, the indictment was issued by a GJ in Ohio.
https://www.rt.com/usa/498072-millie-weaver-documentary-arrest-shadowgate/
McRaven is undergoing treatment for cancer. That’s why he stepped down as Chancellor of UT. If he was leading at one point, he’s most unlikely to be leading anything now.