The Instagram 'suicide network' linked to deaths worldwide
Heidi's daughter Andrine took her own life aged 17.
She had a secret Instagram account where she posted pictures of self-harm, up until her suicide.
Analysis by a team of Norwegian journalists has revealed that she was linked to another 1,000 accounts all posting similar dangerous content - around half of them in English.
And at least another 14 girls in that same Instagram network have also taken their own lives.
Catrin Nye reports.