On April 7, 1982, in the rural community of Yale, Michigan, 9-year-old Dean Dino Giuliani was found shot to death in his family’s ranch-style home just south of the city. Four other family members were also killed that day: adoptive mother Betty Giuliani and three siblings, Erick, 19, Kathleen, 16, and Cindy Joe, 13. The killings devastated the small town and drew widespread attention.

Police quickly identified a suspect: a 16-year-old junior at Yale High School, Jimmy Porter, who was reportedly a friend of one of the Giuliani children. He was arrested and charged with five counts of first-degree murder, and the St. Clair County prosecutor sought to try him as an adult. The motive for the attack was not immediately clear.

If anyone knew Dean or his family, or has information about what happened that day, please share what you know.