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.