Baby Holly (found and living in Oklahoma)

 They used DNA and found her

Extra links if you never heard of the Christ Family, or Lightning Amen

https://www.newspapers.com/article/corpus-christi-caller-times-lightning-am/134626242/?locale=en-US

https://web.archive.org/web/20170828161212/https://www.washingtonpost.com/web/20170828161212/https://www.washingtonpost.com/archive/local/1980/05/01/jesus-return-claimed/6f5e70f6-8acf-4f4b-a85c-5593246485fb/?utm_term=.e28a82c6eb72

https://www.reddit.com/r/TrueCrime/comments/v8h2sv/42_years_later_a_murdered_texas_couples_missing/