A true story of marriage, obsession, and murder. This season on Case Closed, a deep dive into the disappearance of 19-year-old Erin Corwin. New episodes on Tuesdays, beginning January 29th.

On the last day of her life, Erin Corwin awoke around dawn. She was going to Joshua Tree National Park, where she said she was scouting trails for an upcoming visit with her mother. She took her cell phone, kissed her husband goodbye, and headed off for the day. But Erin would not come back from her trip alive.

Who was Erin Corwin? How did she go from being a sheltered teen from a small town to a Marine wife with so many secrets? And how did she meet such an untimely end?

You can preorder Shanna Hogan's Secrets of a Marine's Wife now.

You can listen to the second season of Case Closed early on Stitcher Premium with the code CLOSED.

"Nobody comes to Twentynine Palms on purpose. And they're all there for the same reason."

Erin Corwin had left her family behind and moved to California to join her husband, Jon, on the military base in Twentynine Palms, a remote town in the Mohave Desert. What was Erin's life like there? Who were the new friends she made? And where did it all go so wrong?

You can preorder Shanna Hogan's Secrets of a Marine's Wife now.

You can listen to the second season of Case Closed early on Stitcher Premium with the code CLOSED.

Erin Corwin had settled into life on the Marine base in Twentynine Palms, California. She and her husband Jon had befriended their neighbors, the Malakies and the Lees, and the three couples had become very close, spending most of their time together. But by the next spring, the relationships between the trio would be changed forever — and by June, Erin would be dead.

You can preorder Shanna Hogan's Secrets of a Marine's Wife now. You can also listen to the second season of Case Closed early on Stitcher Premium with the code CLOSED.

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"I was determined — see, I’m the kind of person where I get sent on a mission and I don’t give up. I won't stop until I find her."

When Erin Corwin went missing, it became clear to the detectives investigating the case that there was foul play — and there was one suspect who quickly rose to the top of their list. But before we get into how exactly Erin died and who killed her, we’re going to skip ahead — to the search for Erin’s body, in the desolate desert setting of Joshua Tree National Park. Because although many murder investigations are somewhat straightforward, the rescue and recovery operation to find Erin Corwin was anything but.

You can preorder Shanna Hogan's Secrets of a Marine's Wife now. You can also listen to the second season of Case Closed early on Stitcher Premium with the code CLOSED.

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Hundreds of volunteers and law enforcement officers spent eight weeks and over 5,000 hours searching for Erin Corwin. In the end, the discovery of Erin’s body at the bottom of a mineshaft in Joshua Tree National Park was a big deal — and not just because the search had been so difficult. Without a body, it would have been almost impossible to convict Erin’s killer. And shortly after she went missing, the San Bernardino County Sheriff’s Department was almost positive they knew who killed Erin Corwin.

Shanna Hogan's Secrets of a Marine's Wife is out everywhere now. You can also listen to the second season of Case Closed early on Stitcher Premium with the code CLOSED.

For more great stories, check out The Moroccan Girl and subscribe to the Macmillan Podcasts newsletter.

This week, we'd like to tell you about another true crime podcast you might like: Unsolved. More often than we'd like to believe, people get away with murder. On the podcast Unsolved, hear these real-life mysteries. Subscribe here, or wherever you listen to your favorite podcasts.

Shanna Hogan's Secrets of a Marine's Wife is out everywhere now. You can also listen to the second season of Case Closed early on Stitcher Premium with the code CLOSED.

For more great stories, subscribe to the Macmillan Podcasts newsletter.