It seems insane is evolving. They now evolve to be rational killers.
Quote, "Norway killer found insane, unfit for prison
By BJOERN H. AMLAND and KARL RITTER 11/29/2011
...... Their conclusions surprised many outside experts and contrasted with earlier comments by the head of the review panel, who told The Associated Press in July that it was unlikely that Breivik would be declared insane because the attacks were so carefully planned and executed.
"It is difficult to see this as criminal insanity," Anders Forsman told AP. "He seems to have carried out the killings in a rational way. He is an efficient killing machine."