This episode is about the disappearance of Maura Murray from 2004. There are no solid answers just a lot of theories on what happened, it's a strange one.
https://en.wikipedia.org/wiki/Disappearance_of_Maura_Murray
https://www.fbi.gov/wanted/vicap/missing-persons/maura-murray---haverhill-new-hampshire
https://washingtoncitypaper.com/article/180812/army-major-indicted-in-dc-for-alleged-2011-sexual-abuse-incident/
https://www.wmur.com/article/new-hampshire-unsolved-case-file-where-is-maura-murray/16760962#
https://thoughtcatalog.com/jordan-windnagle/2020/03/the-most-debated-mystery-of-our-time-the-disappearance-of-maura-murray/