everyone. he wasn't thinking. it feels like a nightmare. i don't believe this is true. >> reporter: police say the suspect hunted the victims, aged from 12 to 19, shooting them for 90 minutes. but when police finally arrived, this is his moment of surrender. no resistance. he had no police record. >> we have not arrested him before or anything like that. >> reporter: police say in may the suspect bought six tons of fertilizer, similar to the kind timothy mcveigh used in oklahoma city. it may have been used to make the bomb. after setting off the car bomb that killed seven in oslo's central square the suspect drove to the island, less than an hour away, dressed as a policeman. he told the teenagers he needed to protect them after the oslo bombing. he gathered them close and opened fire. >> the reason i thought it was a game or, i don't know, something else, was it was like not high sound shooting. it was like a silencer or