Provided to you with much <3.
Under the suspicion of having created a computer virus, Kyoto Prefectural Police have taken into custody a 13-year-old eighth-grader living in Tokyo, Akiruno City, and notified the children's welfare center, based on the youth's misconduct of virus creation (skipping translation of official name of crime, which is provided here as well).
According to the announcement, a male student created a virus last year, on August 5, that forcibly shuts down computers. His deed has been recognized as a misconduct/misdemeanor.
The male student was at the helm of a membership-based site where hackers exchange information. "I was interested in hacking and wanted to study hacking, and created the site in August last year," he explains.
Kyoto Prectural Police have also arrested a suspect, a 23-year-old contruction worker from East Yamato City in Tokyo (name is in the article, but I don't agree that it should be published at this stage so I won't romanize it. Google Translate probably did it anyway though), who gave technical lessons on that site, under the suspicion that he had stored a virus on his home computer that deletes files on computers without permission.
(July 5, 2012, Yomiuri-Shimbun)