This episode is about Elijah "Bear" Diaz and Janice Marie Hannigan.

Sources:

Elijah:

https://www.nbcsandiego.com/news/local/year-later-san-diego-mans-2015-disappearance-still-a-mystery/2244819/

https://charleyproject.org/case/elijah-runningbear-diaz

Janice:

https://charleyproject.org/case/janice-marie-hannigan

https://www.yakimaherald.com/news/topics/the_vanished/47-years-zero-answers-16-year-old-janice-hannigan-of-toppenish-disappeared-after-christmas-eve/article_320dd326-da70-11e8-b3d5-cf9009f8677d.html