Here's a link to the NPS Cold Case database:
https://www.nps.gov/orgs/1563/cold-cases.htm
The list of people cycles irregularly (with the closing of cases with bodies found, NOT explained) and you can look through wayback to find descriptions of more cases. It might be worth the time to pin a google map with the locations each person vanished, to see if there's any pattern, shape, or places that have an unusually high incidence of vanishings.
A very recent high-profile case internationally was the disappearance and death of Richard Morris, a British diplomat, whose dead body appeared in a distant forest after vanishing on a run. One might cynically expect a murder, battery, or signs of animal attack, but in fact his apparent relocation and death came with no immediate cause or signs of struggle- in fact, police basically consider the death "unsuspicious," despite the facts that:
>They missed him on the first search, which included where he allegedly died.
>He left the trail, and the reason he left the trail at all is unknown.
>He had no history of cardiovascular disease and was an accomplished runner, so the usual causes of such spontaneous death are suspect.
Explicitly paranormal causes aside, it definitely feels like some MIB shit.