The grand jury scheduled by a former prosecutor was supposed to start Tuesday but State Attorney Angela Corey's office confirmed Monday that no grand jury would be used in the case, The Miami Herald reported.
Gov. Rick Scott assigned Corey, the state attorney for Duval, Nassau and Clay counties, to take over the case from Seminole County State Attorney Norm Wolfinger March 22.
Martin, who was unarmed, was fatally shot Feb. 26 by neighborhood watch volunteer George Zimmerman, 28, after Zimmerman called police to report a "suspicious" person in a gated community in Sanford, Fla.,
Zimmerman was not arrested because of Florida's "Stand Your Ground" law that allows deadly force if a person feels his life is in danger.
Martin's Twitter account suggests he was a typical 17-year-old who liked girls and wanted to go to college, supporters of the slain Florida teen say.
His posts, which were hacked by white supremacists and posted on the Internet, also show he loved rap music and liked joking about street culture, The Miami Herald reported Monday.
The Miami Herald cross-referenced tweets from his account with people mentioned throughout and determined the posts were from Martin's Twitter account, which has since been taken down.
Critics have tried to use the posts to show Martin had a violent nature, but friends says the teen was not violent. Ricaysha Milton, 17, who knew Martin from Carol City High School said Martin would "rather walk away than fight.''
The Herald said the tweets were sometimes vulgar and he often quoted explicit song lyrics.
A screen shot of Martin's Gmail account was also posted on the Internet. It showed e-mails about upcoming SAT exams, scholarship opportunities and invitations to a college open house.
Some experts say Martin's social media posts should be used to determine if Zimmerman's conduct was reasonable, others say a young person's online persona may not offer a true picture of who he is, the newspaper said.