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Example of the Durham Insanity Defense

17 February, 2016 - 11:05

Arianna has been diagnosed with paranoia. Most psychiatric experts agree that individuals afflicted with paranoia unreasonably believe that the human population is “out to get them.” Arianna works under the direct supervision of Nora, who has a physical condition called “walleye.” Nora’s walleye makes it appear that she is looking to the side when she addresses people. Arianna gradually becomes convinced that Nora is communicating secret messages to their coworkers when she is speaking to Arianna. Arianna is genuinely frightened that Nora is telling their coworkers to kill her, and she decides she needs to defend herself. Arianna brings a gun to work one day, and when Nora begins talking to her about her tendency to take overlong lunches, Arianna pulls the gun out of her cubicle and shoots and kills Nora.

Arianna claims she is not guilty for killing Nora by reason of insanity. If Arianna killed Nora in New Hampshire, she might be successful with her claim. Arianna has a mental disease or defect, paranoia. Arianna can probably produce evidence, such as psychiatric expert testimony, that her paranoia “caused” or “produced” her criminal conduct, which was shooting Nora. Thus a trier of fact could acquit Arianna on the grounds that her conduct is excusable under these circumstances.

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Figure 6.4 Durham Insanity Defense