Because it was an honor killing, you see. "Man killed wife, but pleads ‘not guilty,’" from [1] Aftenposten, with thanks to all who sent this in:

An Iranian man charged with stabbing his wife to death outside a crisis center in Drammen last autumn pleaded not guilty when his trial started on Tuesday.

The 44-year-old man also said in court that he was certain his wife had cheated on him, and he blamed her brother for being a bad influence on her. The brother, he claimed, had become "too European," and gave the dead woman "inappropriate advice."