Tonight we take you inside a secret world thats going to stun you, teenagers, social media and murder. She was like well, blackmail me. Mean girls, were they mean enough to kill . It was such a shocking and scandalous case. Evil comes in all shapes and sizes. Im loster holt and this is dateline. Tonight, Andrea Canning with something wicked. In the gentle Rolling Hills of north virginia in a sweet college town lived three teenage girls. Their photos capture a moment in time. They were smart, talented, lovely. Everything a parent could hope for in a daughter. And so who could have guessed just by looking that some of them carried a dark secret about a friend . 911, do you have an emergency . I have a 16yearold daughter. She hasnt been home, not went to work. Im scared to death. These teens played a strange and haunting game. Would you rather suffocate or get shot . Get shot. A game of betrayal that would go beyond drama. Shes calling out help me, why, why, why . At the center of it all