He picked her up at about 2.30 p.m. in our house, and that's when I last saw her.

She gave me a hug and said, she was going and I told her, I love you, be safe.

And she said, I love you too.

And she left. I'm Scott Weinberger,

investigative journalist and former deputy sheriff.

I'm Anasiga Nikolazi,

former New York City homicide prosecutor

and host of investigation discoveries true conviction.

And this is Anatomy of Murph.

Most of us think of the internet as a place to connect, create, and find community.

But for Bianca Devons, a 17-year-old girl from Utica, New York, it was a sanctuary,

a space where she could express herself, share her art, and build friendships.

But that same digital world that made her feel seen would also turn against her,

exploiting her in ways no one should ever have to endure.

Bianca was my first born, and I was young.

I was just a few weeks away from turning 18.

She was just always happy and easygoing.

That's Bianca's mother, Kim Devinz, who told us that even as a young child,

her daughter was full of life, curious, and creative.

Bianca showed natural talent as an artist and loved to express herself through the visual arts.

But as she entered her teenage years, she also faced challenges that would shape much of her adolescence.

She was struggling with some mental health issues, some severe depression. She was eventually diagnosed with borderline personality disorder. So that, I think that her mental health struggles and the fight to find the correct and appropriate treatment for her, kind of like to find her teenage years.

...