Martha Rye Rooks, 55 in the summer of 1991, vanished from Fort Collins, Colorado and was officially reported missing on August 1, 1991. The exact date she was last seen is unclear. At the time she disappeared she was confronting mental health struggles and alcoholism, and she used many names, which has complicated efforts to trace her: Martha Prewitt, Martha Griego, Martha Rye, Glenda Rocha, Glenda DeGregg, Marty Griego, Marsha Greigo, and Bobbie Prewitt.

She is described as a white female with brown hair and brown eyes, 5 feet 1 inch tall, about 100 pounds, with scars on her right knee and right forearm. The Fort Collins Police Department opened a missing person investigation under case number 91-15597, but public details about the inquiry and her last movements are limited. The circumstances of her disappearance remain unresolved.

If anyone knew Martha, saw her in Fort Collins in 1991, or can help clarify where she might have gone, please come forward with information.