Twelve-year-old Katherine Sybil Worsky, known as Katie, disappeared from a friend’s sleepover in Charlottesville on July 12, 1982. Her father had dropped her off the previous evening on McElroy Drive; the next morning she was gone. Shoes and her insulin—Katie was a Type 1 diabetic who required daily injections—were left at the house.

Attention quickly turned to 23-year-old Glenn Haslam Barker, who admitted visiting the girls and giving them beer. Investigators recovered wet, bloodstained clothing and towels hidden in his apartment, two blood types matching Barker and a Type B sample consistent with Katie, and a pair of girl’s underwear with a small bloodstain at the insulin injection site. Barker was arrested and, despite no body being found, convicted of second-degree murder and later paroled in 1992. Her remains have never been located.

What details about Katie’s last hours or about that neighborhood in July 1982 might help anyone who remembers something useful come forward?