A year before she died, Sophie Rottenberg climbed Mt. Kilimanjaro. Her mother says her "tiny hand" photos were a signature joke. Mourners were given the toys at her funeral. She was 29.

A 29-year-old woman confided her suicidal thoughts to an AI chatbot — not to her therapist, not to her parents, not to her best friend. What can AI learn from her death?

(Image credit: Reiley Rottenberg family)