The July 22 attacks were so carefully planned and executed that it would be difficult to argue they were the work of a delusional madman, said Dr. Tarjei Rygnestad, who heads the Norwegian Board of Forensic Medicine.
In Norway, an insanity defense requires that a defendant be in a state of psychosis while committing the crime with which he or she is charged. That means the defendant has lost contact with reality to the point that he's no longer in control of his own actions.
The circumstances of the crime should, of course, be central in determining the defendant's mental state. Too often, though, they are brushed aside, especially by defense psychiatrists.