In this episode of The Last Known, we uncover the unsolved disappearance of Diane Lynn Medicine Horse, a 26-year-old Crow woman who vanished from Crow Agency, Montana, on September 28, 1981. With decades of unanswered questions, we explore what happened that night, why her case was overlooked, and how it fits into the larger crisis of Missing and Murdered Indigenous Women (MMIW). What really happened to Diane, and why has justice been so hard to find?