Jennifer Jareau:  Evanescence , Linkin Park , and Nickelback .
Derek Morgan: So Herman Scobie 's into that nu - metal goth stuff .
Jennifer Jareau: Yeah , and his tramp stamp probably spells out * Massengill*. This guy does n't ever have any Rage Against The Machine . I rock .
Dr. Spencer Reid: How old were you when you started listening to that band ?
Jennifer Jareau: I was probably a teenager . Why ?
Dr. Spencer Reid: You know , _ 14 _ is when we start to make our own musical choices . Our cognitive development evolves at that age and we start to form our own cultural identity .
Derek Morgan: We stop listening to the music that our parents put on and we start listening to the music that our friends listen to .
Dr. Spencer Reid: And those musical experiences imprint on us . Our hormonal surges as teenagers may make the choices seem more personal and passionate . And later on in life we might experiment with other musical selections , but no music ever impacts us as much as that which we listen to at age 14 .
Jennifer Jareau: Herman Scobie 's what , 30 ?
Derek Morgan: If that .
Jennifer Jareau: Okay , so mid to late ' 90s is when he started to take music seriously , stuff like this .
Derek Morgan: And the Piano Man 's songs were all early ' 80s .
Dr. Spencer Reid: Which means the signature does n't fit . Herman Scobie 's too young to be the Piano Man .