This episode is about Israel Keyes, and his three victims, Samantha, Bill and Lorraine. Strong language and details ahead. 

Sources:

https://www.biography.com/crime-figure/israel-keyes

https://military.wikia.org/wiki/Israel_Keyes

~~ https://www.adn.com/alaska-news/crime-courts/2018/05/18/unsealed-interviews-detail-two-lives-of-alaska-serial-killer-israel-keyes/

https://app.stitcher.com/browse/feed/160493/episodes

~~ https://www.oxygen.com/method-of-a-serial-killer/crime-time/serial-killer-israel-keyes-suicide-note