A quick google search suggests various mental illnesses (bipolar disorder, schizophrenia, and the catch-all "serious mental illness" category) are strongly link

A quick google search suggests various mental illnesses (bipolar disorder, schizophrenia, and the catch-all "serious mental illness" category) are strongly linked with violence. http://www.treatmentadvocacycenter.org/resources/consequences-of-lack-of-treatment/violence/1381 http://www.treatmentadvocacycenter.org/resources/consequence... http://www.health.harvard.edu/newsletter_article/mental-illness-and-violence http://www.health.harvard.edu/newsletter_article/mental-illn... The latter article also describes a study suggesting "matched controls" (read: siblings of mentally ill people) are also disproportionately violent which is interesting. Many citations are provided therein. I didn't provide it because it's completely tangential to the main point, namely that there exist crazed and violent people who should be tazed and tied up. I'll note you didn't provide a citation either.