External In the Media 08/19/2026 Peter Valentin, associate professor of forensic science, comments on the mystery surrounding at least four missing women connected to a Philadelphia home that is bringing back memories of serial killer Gary Heidnik. https://www.nbcphiladelphia.com/news/local/4-missing-women-linked-to-olney-home-as-case-draws-comparison-to-gary-heidnik/4447732/ peter-valentin year-2026 news-in-the-media month-august