Dean held the girl for as long as she needed him, knowing that she needed to release all the pain and fear she was feeling. He waited till she ready to leave his arms. Rubbing her back in soothing circles, rocking her as he use to with Sam when he was younger. It was when she was calmer that Dean watched as she looked to them and asked about Thomas. Guessing what Sam was most likely thinking, the older Winchester thought about how to break it to her. He glanced to Sam before looking back to Evie. "Come on." He had no way to be able to tell her so he thought it better to show her as much as he knew that would hurt more. 

When they got there, Dean brought her to the man now known as Thomas. "He seemed to have fought them off as long as he couldn't. We wouldn't have known that you were here if it weren't for him." Dean managed to tell Evie.