In June 1984, the quiet community of Orinda, California, was shaken by the shocking murder of 15-year-old Kirsten Costas, a popular high school student whose death exposed the darker side of teenage friendships, jealousy, and social pressure.

Kirsten was invited to what she believed was a school-related event, but the evening took a horrifying turn. After leaving the gathering, she was attacked and fatally stabbed. What initially appeared to be a senseless murder soon became a deeply complicated investigation involving teenage rivalries, conflicting stories, and questions about who Kirsten's killer really was.

In this episode of Stuttering in Silence, Gavin and Matt take a look at the life of Kirsten Costas, the events leading up to her murder, the investigation that followed, and the shocking circumstances s ...