Anders Behring Breivik, who killed 77 people in Norway last July, should be locked up in a psychiatric ward instead of prison, the prosecution said Thursday, arguing his sanity had not been proven beyond a reasonable doubt. Should the Oslo district court judges however find that the confessed killer is sane, prosecutor Svein Holden asked them to sentence Breivik to Norway's maximum penalty of 21 years in prison, which can be extended for as long as he is considered a danger to society.