The hacker, who goes by the name of Klanklannon, leaked private messages from Martin's Facebook account on 4chan. In addition to the messages, he posted the information for the accounts as well for proof, after changing the passwords to racist slurs. According to Gawker:
"The messages were posted on four slides, strategically arranged to back up the insane racist argument that Trayvon was a Scary Black Teenager and so somehow deserved to be killed by neighborhood watch captain George Zimmerman that night.
A slide titled "Trayvon Martin Used Marijuana Habitually," features an exchange between Trayvon and a friend about getting high. Another slide, "Trayvon Martin was a Drug Dealer" features Facebook messages and photos that supposedly prove Martin dealt drugs, including a picture of Martin posing "aggressively with a large amount of cash in his hand." It's impossible to verify the hacked messages' authenticity—like other anti-Trayvon Martin propaganda, they're probably a mix of real and fake content— but they are now being passed around as gospel among the racist underbelly of the internet, including message boards like the neo-Nazi hive Stormfront, which Klanklannon apparently frequents."
"But Klanklannon included none of Martin's emails in his leak, because the picture they paint is of a normal high school junior preparing for college. A screenshot of Trayvon's Gmail inbox our source provided us is heartbreaking. Martin apparently used his Gmail account for his college search, and it's filled with emails about upcoming SAT tests and scholarship applications. ("Trayvon, now is the best time to take the SATs!") One email included the results of a career aptitude test, our source said. It "talked about his interest in aeronautics and stuff."
This is truly awful. No words.