http://en.wikipedia.org/wiki/Robert_Goren
"I'll tear this place apart because I'm the whack job!"
"As an investigator and profiler, Goren is uncommonly skilled at
sizing up suspects and picking apart the details of crimes. Thanks to
his diverse background and commitment to research (in the episode
“Dead” he called his library card his most important investigative
tool), he is frequently able to recall pieces of information that may
seem obscure but prove to be incredibly relevant to the case.
Additionally, he has an acute sense of smell that discloses details
even a forensics investigator might miss.
During interrogations, Goren has the habit of cocking his head at odd
angles while talking to people – a "side talking" method he uses to
distract and unnerve them. D'Onofrio invented this kind of habit from
a scene in the pilot episode where a suspect he was interrogating
would not look him in the eye. It is such a strong identifier of his
character that in the episode “The Gift” a woman who, while describing
a psychic dream she had, labeled Goren as being "the man with the
broken neck."
Additionally, when questioning people, Goren will attempt to agitate
uncooperative suspects by exploiting a weakness of theirs which he has
noticed. For example, if he believes a subject is a "neat freak"...
