What was in the photographs---

This movie keep me on the edge of my seat. However, sometimes it was hard to understand because I don't speak a lot of Spanish and the closed captioning was sometimes blurred.

I have spent a lot of time visiting in Mexico and felt the film had a core of honesty and did reflect on how difficult it is to stay honest in Mexico.

I did not understand what the honest policeman saw in the photographs.
Any ideas would be appreciated.

Moira