Missing in Finland: The Disappearance of Piia Ristikankare

What happened to the teen after she walked out of her family home in 1988?

Missing: Piia Ristikankare. This is the last known photo of the teenager. Image source.

On Friday, October 7, 1988, fifteen-year-old Piia Ristikankare finished her day at the vocational school in Turku, southwest Finland where she was studying housekeeping. She was planning to spend the weekend at a female friend’s home but her…