This episode is about Rori Hache and Kandis Fitzpatrick two girls who were killed by Adam Strong 10 years apart.

Sources:

https://www.cbc.ca/news/canada/toronto/remains-of-kandis-fitzpatrick-found-14-years-after-she-went-missing-1.6353740

https://www.durhamregion.com/news/crime/dna-links-2nd-missing-oshawa-woman-kandis-fitzpatrick-to-house-where-rori-haches-remains-found/article_99e72863-fa65-5f80-bc7c-3c5bcc6c8607.html