When I was in the Army a court martial consisted of officers (only, and I think the minimum needed was 3). Not sure what they do today, or what other services did then.
The generally accepted wisdom of the day was that, (depending, to a degree on the offense) that if you were innocent, your odds were better with a court martial. If you were guilty, your odds were better in a civilian court.
Getting back to the TV effect (NCIS, etc) saw a new one tonight on Bones.
catching the killer happened because of the "new ammunition" Nice computer graphics of how it worked.
Essentially the old chain/cable shot idea. originally the lab crew thought they were dealing with fragment of a rifle bullet, from the size of the holes, but couldn't find the fragments, themselves. Then they discovered this "new ammo (pistol) where "on firing the bullet separates into 3 pieces, joined with Kevlar" line. The plot had the killer using this, then grabbing the Kevlar line, and pulling the "bullets" back out! SHE was caught because while pulling on the Kevlar, she cut her nail, leaving a tiny fragment that the lab crew used to get her DNA, identifying the killer.
The imagination of the writers amuses me. The only "casual" relationship between what they write and reality doesn't bother me a lot, because I know the difference.
What worries me is that a LOT of people do not.