Carlsbad, New Mexico, a small city dwarfed by a vast, dirt red desert, was home to Jon Green in 2017. That was the year a routine medical exam would become a turning point for him and his doctor, Kim Lark.Erin Moriarty: The very first day when he walks in, how would you have described him?Dr. Kim Lark: Smiling, happy, wanted to talk. Just kind of made you feel comfortable.Months later, they began texting, then dating.Dr. Kim Lark: He liked everything that I liked. … We started skiing together. We started riding bikes together.A missing checkbook and stolen dogsEarly in their relationship, Kim says, Green told her about his troubled past — that he had been falsely accused of arson more than 20 years ago causing the deaths of two people, including a billionaire banker in Monte Carlo.Dr. Kim Lark: I believed him at first. I kind of believed his side of the story.

She says she wanted to believe the best about the new man in her life.Dr. Kim Lark: He said all the right things. … He did all the things that I needed my best friend to be.

Dr. Kim Lark and Jon Green met in 2017.

Kim Lark

By the time they married on Valentines Day 2020, they'd already settled into a comfortable life. Kim had a lucrative medical practice, an $800,000 retirement account tucked away and a home on 4 acres outside of town.Erin Moriarty: At that time, did you realize what he was capable of?