"WTF is a Naval doing not helping this girl?"
Maybe the Naval officer was somewhere he wasn't supposed to be. Or involved in activity that was unbecoming to a military officer and didn't want to have to testify in court.
Regardless of anything else he was or wasn't doing, turning his back on this girl - if the story is true - was the most unbecoming activity he engaged in that day. A plea for help from an American woman in a foreign brothel and he doesn't report it immediately ... that's shameful.
And not wanting to get in trouble for being there is a lousy excuse.