 While Hollings refuses to talk, Brennan realizes that the keys could be what was used to gouge out the eyes of the victim, and orders a photo of each key to be taken to match with the markings on the skull, prior to their release.Concerned for her safety, Booth accompanies Brennan home.Brennan, however seems surprised at Booth's assertion that he spend the night when he says that he'll sleep on the couch.