If you can make it through the second trailer, you can probably make it through the movie...but I don't know.
Haven't seen the movie, but it appears to be based on a real incident in 1999 in Rattlesnake Canyon at Carlsbad Caverns resulting in a homicide.
The story is recounted, not especially well, in a book 'Journal of the Dead'. The author based his work solely on a review of court transcripts and leaves a lot of obvious questions unanswered.
The story of the sole survivor doesn't wash. You simply cannot get lost in Rattlesnake Canyon, and if you climb to the rim as the suspect says they did, you could not fail to see the visitor center or the fact that a very short distance down canyon it spill out onto the plains, with ranches, oil pads, etc. visible.
The best part of the book was the suspect's stated belief that because they had filled out a camping permit they had a 'contract' with the NPS for rescue and handholding.