EP209: Missing: Gary McCullough and Lena Chapin

On May 11, 1999, Gary McCullough went missing after realizing his
wife Sandy was having an affair with another man (and Gary had been
her lover during her prior marriage, to Gary's brother, Albert).
Sandy had six daughters who were fond of their stepfathers (the
brothers McCullough) but one had a secret that she wouldn't reveal
for years regarding Gary's disappearance. Then the daughter with
the secret--Lena Chapin--disappeared too.


SOURCES:
1)
https://www.radiotimes.com/tv/documentaries/true-crime/unsolved-mysteries-lena-chapin-what-happened/

2) https://unsolvedmysteries.fandom.com/wiki/Lena_Chapin
3) https://thelatch.com.au/lena-chapin-unsolved-mysteries/
4)
https://www.phelpscountyfocus.com/article_43d12314-b585-11ea-8a73-2fd3ded7aa62.html

5) Netflix "Unsolved Mysteries" Volume 1, Episode 6