In the moment when her world shattered three years ago, Stephanie Mistre found her 15-year-old daughter, Marie, lifeless in the bedroom where she died by suicide.

Stephanie Mistre's 15-year-old daughter, Marie, died of suicide in 2021, and the grieving mom blamed TikTok for pushing content like suicide tutorials and methods, as well as encouraging users to go beyond "mere suicide attempts."

Three years after a tragic suicide linked to TikTok's harmful content, a mother and six families have sued the platform for failing to moderate dangerous material. They claim the algorithm targets vulnerable users,