Ruth Belle Waymire (April 16, 1960 – c. June 1984), formerly known as Millie Doe, was a formerly unidentified female murder victim whose dismembered body was found in Spokane, Washington in 1984.

While transporting the skull for forensic analysis, the detective responsible for the case was accompanied by his young daughter, who said, "Since we have another person in the room, we should name her.

[3] Despite concerns from Deborah about the speed of their relationship progression,[4] Ruth and Vaughn were married several months later in Wenatchee, Washington,[3] and moved away from Spokane, causing the Waymire sisters to become estranged and lose contact with each other.

Initial estimates by Spokane County Medical Examiner Sally Aiken placed Waymire's post-mortem interval at 48 hours,[6] however, upon noting that the temperature of the river when she was found had been 48 °F (9 °C), Aiken later changed the original estimate to anywhere from several days to several weeks, due to the cold potentially inhibiting decomposition.

Prior to her identification, it was incorrectly believed that Waymire was not local to Spokane, perhaps not even from Washington, as it was considered unlikely that someone would not have eventually recognized her if she was.

[7] Despite happening in the same state as the Green River Murders and containing sexual assault, Waymire's case was never suspected to be connected to Gary Ridgway.

[6] A month after the recovery of Waymire's body, a dog in nearby Rimrock[9] brought home a decomposing, severed human hand,[7] which was initially suspected to be Millie's, and was sent in to the FBI in Washington, D.C. for fingerprinting.

[11] On 19 April 1998, at approximately 7 in the evening, a local resident of Spokane was walking her dog near a vacant lot at the corner of Seventh and Sherman street.

[13] Initially it was thought to be another victim of serial killer Robert Lee Yates, who was active in Spokane at the time.

[14] The lot where the skull was discovered had formerly been home to the Sharon Temple Christian Methodist Episcopal Church, which had been demolished in 1989 after several years of vacancy.

[13] After the church was demolished, the lot fell into disrepair, and the spot quickly became a favorite location of play for children in the surrounding neighborhood.

[2] Geise was to transport the skull from where it was being held to a forensic anthropologist in western Washington, and was accompanied on this task by his fifth-grade daughter.

Following the exhumation and testing of Millie's DNA, Millie's genome was submitted to state, national, and international databases of DNA of unidentified decedents, including the Washington State Patrol's Missing and Unidentified Persons Database and the National Crime Information Center.

[2] In 2004, a woman from New South Wales told investigators that she believed that Millie could be her missing daughter, and her DNA was tested and compared to the victim's, conclusively ruling this possibility out.

[2] In 2007, another facial reconstruction was drawn by forensic artist Carrie Stuart Parks, and a more comprehensive article about the case was featured in a local newspaper called the Spokesman Review.

[9] In 2015, investigators received a tip that Millie could be a missing woman who disappeared from Blythe, California in 1980, having last been seen in neighboring Ehrenberg, Arizona with members of a biker gang.

Genealogists at the company used the profile to provide a list of potential family members to Spokane Police Department, who eventually narrowed her identity down to Ruth Belle Waymire, born on April 16, 1960.