Joan Phyllis Shelton RESOLVED Shelton, circa 2004 Missing Since 02/07/2004 Missing From Pima County, Arizona Classification Endangered Missing Sex Female Race White Age 65 years old Distinguishing Characteristics Caucasian female. Details of Disappearance Shelton disappeared from Pima County, Arizona on February 7, 2004. Her skull was located in January 2008; the rest of the body remains missing. Investigating Agency - Source Information NamUs . .