I am sure the parents thought they could trust Hill since he went to high school with the victim. I am sure he was excited about getting to spend time with his 'friend' on NYE. The parents bear no responsibility in this whatsoever. They believed he was with his friend and never would have guessed in a million years he would be subjected to such horror not only by his so called friend but by the other three. They have to be devastated that this has happened to their son. The police said when they first found him he was so traumatized by what he had endured it took him awhile to even tell what had happened.
Thank goodness the two mean girls went downstairs to confront the one who told them to stop all of the noise and that allowed him to escape the house of horrors. No telling what would have happened to him if he hadn't had any chance to get away from these hate filled monsters. At least that man did the right thing and called 911 on them.
It shows these two young women have a propensity for violence. They didn't say respectfully they wouldn't make any further noise. Oh no, instead they go down, and bust the door open and come inside stealing an item in this man's apartment that didn't belong to them when they left. That is bold and I wouldn't be surprised if they have done violent acts even before this or intimidation using threats.
It wouldn't surprise me in the least either if the two women were the masterminds behind the plan to kidnap, torture, and assault this young man.