Aaron Hotchner:  Dave , a figure 8 ?
David Rossi: That 's what it look like . I just sent you all a picture
Dr. Spencer Reid: Maybe it 's an infinity symbol
Alex Blake: Well , if it 's infinity , he could be boasting " I 'll go on forever " ?
Derek Morgan: Or if it 's an _ 8 _ . Strauss was his 8th victim
Jennifer Jareau: And the unofficial 8th member of our team