What is the nonmedical term for a person unable to be responsible for his actions?

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Insanity is a nonmedical term for a person unable to be responsible for his actions. The word breaks down into the suffix -ity meaning condition, the prefix in- meaning not, and the root -san- meaning sound, healthy. Insanity is a legal term for a severe mental illness, present at the time a crime was committed, that impaired the defendant's capacity to understand the moral wrong of the act. It is not a medical diagnosis.

What Is the Nonmedical Term for a Person Unable to Be