Matt knew that this was wrong, and yet he still went ahead with his project. Holly had asked him not to delve into her past, but his idealistic mind thought otherwise. In his heart he knew that if he could maybe get this Jesse guy to understand, then maybe he would consider the idea of not blackmailing Holly any longer.
He was not stupid by any measure, and his mind begged him to give up this project, but he coldn't do it. He couldn't stand on the side and watch a girl being blackmailed and criminalised for no apparent fault of hers. Of course she shot him, but not in cold blood. Not without provocation.
So with almost trembling hands and tremendous misgiving, Matt created a fake Facebook id and started searching for Jesse.