You just keep doing the same thing! If you want to know you'll need to do reconstructions. In the DPI, clothing was taken from the two deceased Yuris and the rescuers apparently found some near the "den," as if left there for the other three (the most obvious conclusion). There are all kinds of "mysteries," which are almost always due to lack of understanding/knowledge, such as rocks that apparently move by themselves. In one case similar to the DPI, a guy died in the tent because the wind was so strong it ripped open a hole in it, and he couldn't do anything because of a raging storm, so he froze to death clutching the tent pole. The rescuers were initially puzzled that part of his body was quite decomposed but other parts were not. They eventually figured out that during the day, the sun struck the parts of the body that decomposed but not the others. The "big picture" is usually the best you can do in any case; all the details are usually not understood. In crimes, motivation is often not known. In the DPI, everything fits like a glove, except for details that would require reconstructions, and perhaps some of those reconstructions would need to be done in the same spot under the same weather conditions.