UMs: Unexplained Events Part 1

Okay, if you don't know the drill by now, well, I'll still explain it. First you put the lotion in the basket. No, I mean put on the best version of the UM song and then read the following stories from another category, unexplained events:

The Night Stalker serial killer is captured, but the person responsible is never identified and never claimed the reward. 
https://www.reddit.com/r/UnresolvedMysteries/comments/ht5fcg/what_happened_to_the_man_who_helped_capture_the/

A 25 year-old unsolved math problem is solved by a user on 4chan that remains unknown:
https://www.reddit.com/r/UnresolvedMysteries/comments/9w0155/who_is_the_4chan_poster_who_helped_advance/

I saw good mini documentary about this guy before, but if you haven't heard of James Hampton, read on:
https://www.reddit.com/r/UnresolvedMysteries/comments/o640cr/a_religious_notebook_in_a_mysterious_undeciphered/

Sometimes the Catholic Church is is just an unintentional mystery machine, such as this case:
https://www.reddit.com/r/UnresolvedMysteries/comments/imdlwc/other_pope_john_paul_iis_secret_cardinal/

The silent twins June and Jennifer Gibbons. They refused to communicate until one died, the other stated she was finally free:
https://www.reddit.com/r/UnresolvedMysteries/comments/4kesy4/june_and_jennifer_gibbons_also_known_as_the/