Off-base and on-base

Remember the case of the airman who was to be tried by court-martial for an off-base vehicular homicide? He just got 5 years and a bad-conduct discharge, according to this report. One does wonder, Solorio notwithstanding, why this off-base case wasn't tried "downtown." And what is your reaction to this case: a soldier charged with murdering his estranged wife (a vet, now a civilian) at Schofield Barracks in Honolulu? Sure, it's constitutional, but why isn't the case being handled in a civilian court? What urgent military interest is served by trying it in a court-martial instead of a civilian court with the full panoply of constitutional protections? Discuss among yourselves.