A high school house party is in full swing in the quiet town of Peachland, Canada. Suddenly, hysterical screams are heard. 16-year-old Ashlee Hyatt has been stabbed to death in the middle of the driveway.Piece by piece we learn about the girl who is ultimately convicted of manslaughter, relating it to the story of the Canadian “Barbie” serial killer, Karla Homolka and notorious Hungarian countess Elizabeth Báthory.Murder is a typically committed by men, and the victims are mostly other men. Globally, women represent less than 5 percent of perpetrators. On this episode of Bad People, presenters Julia Shaw and Sofie Hagen discuss when and how women kill.Warning: This episode contains strong language and references to sexual violence and murder.Archive credits: This episode includes audio from SkyTV, Castanet News and National Geographic.CREDITS:Presenters: Dr. Julia Shaw and Sofie Hagen Producer: Louisa Field Assistant Producer: Simona Rata Music: Matt Chandler Series Editor: Rami TzabarCommissioning Producer: Hannah Rose Commissioning Executive: Dylan Haskins Commissioning Editor: Jason PhippsBad People is a BBC Audio Science Production for BBC Sounds #BadPeople_BBC