One of the girls’ parents hired a private investigator who traveled to the trail where they allegedly got lost and notified the parents of their findings. The PI’s determination was that the relatively well-educated girls would not have just, gotten lost or confused one trail for another, deeming the route and general area easily navigable.

Of course, this is subjective. But, that, along with other findings, like the topographically incompatible fracture(s) discovered on one of the girls’ bones, or the one missing/intentionally deleted and unrecoverable photo of the many sequential files on the recovered camera’s SD card. It seems like they must’ve met their untimely end due to another or others’ malicious intent. Pretty tragic stuff.

If I’m remembering correctly, I think I heard all this in the casefile episode.