When 25-year-old school teacher Christy Mirack is found brutally murdered in her Lancaster, Pennsylvania, apartment in 1992, there is no shortage of suspects. Twenty-six years after her murder, cold case detectives get a break when the sister of the killer uploads her DNA profile to a public genealogy website. This development leads to the arrest of a former disc jockey, Raymond Rowe (who performed under the name DJ Freez) who accepted a plea deal and admitted his guilt.