Sam and Bobby looked at each other before looking to her. Sam hated to hear someone tell him he didn't try hard enough. From Dean's lips it might be different but from her, was another thing. "Have you," Sam finally spoke as he took her in.
Bobby stepped forward after placing a hand upon Sam's shoulder. "You are probably not gonna like what you hear. Or even believe it. But Dean did try and fight." Bobby turned and grabbed a book, flipping it open and then dropping it upon her lap. The book open to hell hounds.
"You wanted to know, well that is what killed him. A Hell hound. Dean made a deal, his soul, Sam's life. And the one who had his contract was not gonna give it up. He fought, he lost." Bobby crossed his arms.