I absolutely agree with you about Setsuko's hair. It is also quite rare for me to favor short haired girls in anime (favorites are C.C., Hitagi, Holo, Lamhirh, Saber), but in this case, the long hair just looks awkward.

The MPs could have caught Sakuragi holding the knife beside Ishihara, and shot him thinking he was attacking the guard. This death march thing just doesn't make sense.