Should have left him with the Krauts. They may be soft on murder, but he’d probably have gotten some time for drunk driving. Instead it looks like the Lavender Hill Mob in the Army was trying to look out for him.
Typically, host nations will turn US on US crimes back to the military even if the crime occurred off post. They would not want to bother German taxpayers with the costs of a trying an American service member for the murder of another American service member. Had the victim been German, I can pretty much assure you, the Germans would have retained the right to prosecute. While I agree this has all the makings of a homosexual love spat gone wrong, I don't think there was any lavender mafia pressure on the Germans to turn the suspect back to the US. There will be ample pressure from that crowd however, to keep the trial details out of the press if things are as they appear on the surface.