A girl in a high school football-obsessed small town went to a party and was assaulted by football players who later bragged about it on Twitter.
A blogger saw the posts (later deleted) and took screenshots. She tried to get justice for the victim by re-posting these on her blog. For this she was hounded relentlessly in the town and a defamation suit was brought against her.
The players bragged that the coach knew about the accusations and would make them go away.
Two of the football players were later given 1 and 2 year sentences in juvenile detention, largely due to the efforts by people who got involved in bringing this case to a wider audience.
As for the hacker...
I've read the linked article, another article, the accused's webpage, and an article by the blogger who stood up for the rape victim, and I still can't figure out exactly what role, if any, this guy had in this mess.