Booth: Look, shouldn't there be more blood?
Brennan: Yes, it-it appears all of the blood has been drained from the victim's body.
Booth: I'm guessing psycho
Brennan: But look at the ribs, two through six, on the left side.
Hodgins: Bite marks.
Brennan: No. It-it's not human dentition.
Booth: I'm confused.
Brennan: Me, too, a-and I don't like the feeling.