What exactly a detective was investigating? [spoilers]
After watching the movie I was sort of dissapointed that details of a detective's mission weren't revealed.
There are several crimes which he might have been investigating:
1) Finding out hidden money by following Father Daniel.
Seems unlikely since he got there before the Father and he was interested primarily in the hotel itself.
2) A murder commited by Ruth. Unlikely as well since the murder took place somewhere else (Summerspring sisters were in that hotel for the first time) and detective was not interested in Emily at the beginning of the movie.
3) A source of dirty videos with celebrities. Kind of makes sense considering that he was searching for "bugs" and cameras in a room for newlyweds.
It seems that it's the 3rd option, but this theory has some flaws. Why have a chief officer ordered the detective to prevent guests from leaving? Why did secret services launch such a large scale operation against the hotel with spy cameras (it was mentioned that the hotel wasn't favored by celebrities for the last ten years or so. Also, nobody knew about a film with some politician involved except Miles)?
Perhaps the detective was investigating another crime which hasn't been revealed. What do you think?