MADISON, Wis. (AP) -- The Wisconsin Supreme Court says a Beloit man convicted of fatally stabbing his ex-girlfriend should not have been granted a new trial based on his insanity defense.
The court on Wednesday overturned a state appeals court which last year granted Donyil Anderson a new trial. He was sentenced to life in prison for the 2008 killing of Stacey Hosey.
Anderson argued on appeal that he deserved a new trial because instructions to the jury about how his mental state may have been affected by a drug he was taking to treat attention deficit hyperactivity disorder.
But in a 5-2 decision the Supreme Court disagreed.
It says an insanity defense cannot be based on the defendant arguing his mental state was caused by the taking of a prescription drug.