

Sheridan County Jane Doe was a pregnant teenager or young woman found murdered in Wyoming in 1992, as the third known victim of a previously unidentified serial killer. She was found along Interstate 90. Twenty missing women have been ruled out as being the decedent.
Case
The female's decomposing body was discovered along Interstate 90. Her cause of death (sometimes listed as beating) could not be determined, but it is presumed to be homicidal in nature. The victim was also sexually assaulted.
DNA linked her to the killer of Pamela McCall and Irene Vasquez. McCall was located in Tennessee on March 10, 1991, close to Interstate 65. Vasquez was discovered in Wyoming on March 1, 1992, along Interstate 80.
Suspect
The modus operandi of the killer includes the following details: all three were either pregnant or had a history with childbirth, aged 32 and below, and had brown hair. McCall was strangled; Vasquez was possibly beaten. Sexual assault was also consistently evident in all three murders. Jewelry (if any) and footwear were also missing for each; although Vasquez was the only nude victim.
In May 2020, Clark Perry Baldwin, 59, of Waterloo, Iowa, was arrested and charged with the three victims' murders, along with that of Pamela McCall's unborn child.
In May 2025, Baldwin was found guilty in the murder of Pamela McCall. He now faces two extraditions to Wyoming, first for the murder of Vasquez and second for the murder of this Jane Doe.
Characteristics
- The victim had brown hair that was shoulder-length and wavy. It appeared to have been sun-bleached, indicating she spent time outdoors.
- She was approximately 10 weeks pregnant at the time of her death and had previously given birth.
Clothing and accessories
- The victim wore a light blue and white checked "midriff" shirt that was fastened midway across her abdomen. It had "false jewel" and pearl buttons.
- Blue jeans, size 5-6.
- Light blue bra, 38C.
- Wide white plastic belt with a silver colored buckle.
- Nylon pink bikini panties with paisley design.
- Brass circular earrings.
Exclusions
Gallery
Sources
- Sheridan County Jane Doe at NamUs
- Sheridan County Jane Doe at the Doe Network
- Great Basin Murders on Wikipedia
- FBI ViCap
- Oil City News