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News & Events | Van Wagner & Wood | Drunk driving defense & criminal defense attorneys
Meet Attorney Chris Van Wagner virtually Attorney Christopher T Van Wagner (Chris VanWagner) named 2006 Super Criminal Defense Lawyer by Super Lawyers of America
Meet Attorney Tracey Wood virtually Attorney Tracey Wood appointed to Board of Regents National Clg of DUI Defense. Attorney Wood is Wisconsin's foremost authority on drunk driving laws, called OWI in Wisconsin & known as DWI in some states
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Insanity

Under common law principles, if a defendant can prove that he was insane at the time that the crime was committed, criminal liability will not attach. In order to prove insanity, the defendant must be proclaimed insane. Insanity is a legal term defining a mental disease.

At common law, the three primary tests for proving insanity are: M'Naughten, the irresistible impulse rule, the MPC, and in some jurisdictions, the Durham rule.

The M'Naghten rule is used in a majority of jurisdictions. This rule is often known as the "right & wrong" rule. The rule provides that criminal liability will not be imposed if it can be proven that the defendant was not capable of knowing right from wrong at the time that the crime was committed and that he did not understand the nature and quality of his decisions or was not capable of understanding that his actions were wrong. The aspect of what is right and wrong may apply to both legal wrongs and moral wrongs.

Under common law's irresistible impulse rule, the M'Naghten rule is employed, but in addition to it, a test is also conducted of the defendant's volitional capabilities.

Under the Model Penal Code (MPC) rule, a substantial capacity test can be applied that considers both the cognitive ability and the volitional capabilities of the defendant at the time that the crime was committed.

Diminished Capacity

Under common law principles and in most jurisdictions today, the affirmative defense of diminished capacity provides an affirmative excuse for the commission of a crime.

Intoxication & Insanity

Involuntary intoxication is, in effect, an insanity defense to a specific intent crime that rests upon the ability to prove that the defendant was without an ability to form the mind necessary to understand the results of his actions. A person who is declared legally insane in incapable of forming the mind required for the mental element of the crime.

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