The murder of Laurie Show occurred on December 20, 1991. Show was a 16-year-old sophomore student at Conestoga Valley High School. Show’s body was discovered in her Lancaster, Pennsylvania home on December 20, 1991 by her mother Hazel Show, with Show’s throat cut. Classmates Lisa Michelle Lambert, Tabitha Buck, and Lawrence “Butch” Yunkin were charged with her murder. Lambert initially began harassing Show in 1991 after learning that Laurie Show briefly dated Yunkin over the summer. Lambert and Yunkin had had a previous relationship with each other, but had reportedly not been dating during the time Yunkin was dating Show. Show and Yunkin had gone on a few dates, with Show reporting to her mother that Yunkin had date raped her. Shortly after his final date with Show, Yunkin resumed dating Lambert, who was pregnant with his child. Reported to be “obsessively jealous” of Show, Lambert proceeded to harass Show in various ways such as appearing at Show’s job and verbally assaulting her. Witnesses reported that Lambert had expressed an intent to “scare Laurie, then hurt her, then slit her throat”. On December 20, 1991 Show’s body was discovered in her home by her mother, with the body showing several wounds. The police later recorded that Show had received ” a five-inch gash to the throat; a stab wound that punctured a lung and another that grazed her spine; several wounds to the head; and a number of defensive wounds”. Hazel Show was not at home, as she had driven to attend a meeting with a school counselor. Show’s mother reported to the police that her daughter had named Lambert as her killer, saying “Michelle did it”.

Police arrested Lambert, Yunkin, and Lambert’s friend Tabitha Buck at a local bowling alley later that day for the murder of Show. Initially testimonies from the three showed that Yunkin had dropped Lambert and Buck off at Show’s house, where the two girls murdered Show. Yunkin stated that he had not participated in the murder. Yunkin also stated that while he was under the impression that Lambert and Buck were going to cut Show’s hair with the knife as a prank, he did help provide an alibi and helped to dispose of evidence. This testimony would later change as Lambert and Buck both recanted their initial testimonies, with Lambert stating that an abusive Yunkin had encouraged her to harass and assault Laurie Show.