Its probably theatre to keep the locals on edge and fearing their govt.
Short of getting into a firefight with them there isnt much you can do but relax and place faith in your havent harmed anyone lifestyle.
Which is much easier to think from 500 miles away than it must be to be in the middle of it.
Having been deported from there in '13, i can tell you that the immigration holding cells will not separate you and it will likely take ten days to process you during which they will feed you from a local restaurant.
They put me on a plane to houston and that was that, for me.
While i was there a dozen people, male and female, were brought in and we watched tv in the day room. They separated the sexes at night, but let us out in the morning, and all day.
But again, they are most likely looking for somebody high on their list.
I would think that taking pics of them might be ill advised, if for no other reason than drawing attention to yourselves.
Can you change locations for a bit?
Better to stay with friends and let them feed and water the animals, if you can.

I would also strongly insist on a crash course on @marcstevens.
Learning what he advises could put the kibosh to your problems before you get to far into the legal process.
You just have to ask the questions and insist on answers to them to expose that they are the criminals.