Analyzing the words of psychopaths (2011)

Glenn has mentioned that he sees Claudius as being at least partially a sociopath. This lecture by Jeff Hancock, a professor of communication, delves into the linguistic variation between reports of murders given by imprisoned psychopaths versus imprisoned non-psychopaths. 

Note his point that psychopaths tend to use murder to achieve an instrumental, material, goal. Also note the emphasis psychopaths put on eating and drinking when describing their murders.

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"Hungry like the wolf: A word-pattern analysis of the language of psychopaths" Hancock, Woodworth & Porter. Legal and Criminological Psychology (2011)

Prison interview with psychopathic murder Paul Bernardo (mentioned as an example in the above talk)