After investigating her social circle, NCIS agents discovered that Erin was planning to go into the desert with her neighbor Christopher Lee. But Chris claimed to barely know her. NCIS and the local sheriff's department dug deeper, and found out that Chris and Erin had been having a secret affair for months before Erin went missing. Listen early and ad-free by subscribing to 48 Hours+ on Apple Podcasts: https://apple.co/4aEgENo To learn more about listener data and our privacy practices visit: https://www.audacyinc.com/privacy-policy Learn more about your ad choices. Visit https://podcastchoices.com/adchoices