I searched "DHS court-martial general" and the only thing that came up was the Air Force court-martial I linked to, and I don't see the DHS connection you menti

I searched "DHS court-martial general" and the only thing that came up was the Air Force court-martial I linked to, and I don't see the DHS connection you mentioned. The Coast Guard is under the DHS, the Air Force is under the Department of Defense.