DUH TO YOU! If you read it correctly, the authorities were talking to him about a week and then arrested him instead of the first day. So he was confused as to why after a week of them asking all sorts of questions and saying you don't need a lawyer they then place him under arrest and don't even have a charge against him.
i'm sorry; are you part of the "anti-reply-button" club? i feel i read the article correctly. the guy's a dolt for talking to the cops for a week and then being surprised that they were spending that time gathering evidence against him. knowing that he sent the worm, why did he think they were asking him questions...'cause he's an expert?