Confessed mass killer Anders Behring Breivik has told an Oslo court that he was basically a "nice person" who had trained himself to eliminate his emotions so he could carry out his attacks.
Breivik was giving his testimony for the fourth straight day on April 20, as prosecutors asked him in detail about his July 2011 shooting spree at Utoya island.
On April 19, Breivik explained how he had played computers games up to 16 hours per day and used daily meditation to "hammer away" emotions.
He said that he intended to kill all 569 people on Utoya, instead of the 69 -- mostly teenagers -- that he actually killed.
Eight others were killed earlier the same day by a car-bomb blast that Breivik detonated in Oslo.
Breivik has admitted the killings, but has pleaded not guilty to murder, saying the attacks were "self-defense" against the government's multiculturalist policies.
Based on reporting by AFP and dpa