http://www.slate.com/blogs/future_tense/2015/04/10/florida_middle_schooler_arrested_charged_with_hacking_cybercrimes.html
Eighth-grader Domanik Green, 14, of Paul R. Smith Middle School in Holiday, Florida, was recently arrested and charged with offense against a computer system and unauthorized access (which is a felony charge). He was released from Land O'Lakes Detention Center on Wednesday.
The Tampa Bay Times reports that the Pasco County sheriff's department took action after Green used a teacher's administrative password to log onto a school computer. While accessing the machine, he changed its desktop background to an image of two men kissing. The computer had state standardized testing questions on it, though they were encrypted and police say that Green didn't access them. "I logged into a teacher's computer who I didn't like and tried putting inappropriate pictures onto his computer to annoy him," Green told the Times.
Sheriff Chris Nocco said, "Even though some might say this is just a teenage prank, who knows what this teenager might have done." Green says that his peers frequently use the admin password to video chat or screenshare on school computers. The code is easy to remember because it's just a last name. Green discovered it by watching a teacher type it in. Green was originally suspended from school for three days and other students were punished, too, but he was later arrested because the school deemed his infraction more serious. It is now overhauling its password system.