AUSTIN, Texas (KXAN) In Williamson County, Texas, the oldest unresolved case involves a woman discovered deceased on Halloween in 1979.

Her remains were located in a ditch beside Interstate 35 near Georgetown, not far from Austin. Clad only in a pair of orange socks, the lack of identifying details led investigators to refer to her as “Orange Socks” for more than 40 years.

Several years after the case began, notorious serial killer Henry Lee Lucas admitted to murdering “Orange Socks,” among hundreds of other supposed victims nationwide, only to later retract his confession.