Carol Ann Dougherty was on her way to meet friends at the library in her small Pennsylvania hometown on an October day in 1962. The 9-year-old never made it there.

She stopped, apparently to say a short prayer at St. Mark Roman Catholic Church, parking her bicycle outside. When she didn't return home for dinner, her parents began searching for her.

Her father, spotting her bike, went into the church, and discovered her battered, partially-clothed body in the choir loft.

Discover WITNESS: Access our exclusive collection of true crime stories, podcasts, videos and more

Her murder would remain unsolved for 63 years.