Earlier, a senior law enforcement source familiar with the Martin death investigation told CNN said that Zimmerman would be charged.

Police say Zimmerman fatally shot Martin, a 17-year-old African-American, on February 26 in Sanford, Florida, after Martin began walking home from a convenience store. Zimmerman, who is Hispanic and was a neighborhood watch volunteer, had called 911 to complain about a suspicious person in the neighborhood. He was released without charges after claiming self-defense, but the case was referred to a special prosecutor as thousands converged on Sanford to join in protests calling for Zimmerman’s arrest.

The following are running updates on the story:

[Updated at 3:34p.m. ET] The parents of Trayvon Martin plan to hold a news conference after the special prosecutor makes her announcement.

[Updated at 3:07 p.m. ET] Many people in Sanford, Florida and around the world have been captivated by the Trayvon Martin case and have lent their support to Martin’s family.

Upon hearing the news that special prosecutor Angela Corey was holding a press conference today to update the media, Martin’s mother Sybrina Fulton tweeted that the case was in God’s hands now.

[Updated at 3:02 p.m. ET] The office of special prosecutor Angela Corey has confirmed that a news conference updating the media on the Trayvon Martin case will begin at the State Attorney’s Office in Jacksonville, Florida at 6 p.m. ET.

[Updated at 2:51 p.m. ET]  Corey’s office, which is investigating the Trayvon Martin shooting case, said that charges against George Zimmerman have not been filed. The office would not confirm whether the office planned to charge him, according to HLN’s Josey Crews.

Earlier, CNN reported that Corey is expected to announce a decision Wednesday regarding whether she will file charges against Zimmerman, and a senior law enforcement source familiar with the Martin death investigation said that Zimmerman would be charged.

[Updated at 2:39 p.m. ET]  George Zimmerman “will be (criminally) charged if (he) hasn’t been charged already,” according to a senior law enforcement source familiar with the Trayvon Martin death investigation.

It’s not clear what the charges would be.

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[Initial post, 2:29 p.m. ET] A special prosecutor in the Trayvon Martin shooting case is expected to announce a decision within the next four hours regarding whether she will file charges against George Zimmerman, CNN reports.

The news comes a day after attorneys for Zimmerman told reporters they had lost contact with Zimmerman and no longer represent him.

Police say Zimmerman fatally shot Martin, a 17-year-old African-American, on February 26 in Sanford, Florida, after Martin began walking home from a convenience store. Zimmerman, who is Hispanic and was a neighborhood watch volunteer, had called 911 to complain about a suspicious person in the neighborhood.

Zimmerman told Sanford police the shooting was self-defense, and Zimmerman was released without charges. Authorities have said Zimmerman was not immediately charged because there were no grounds, at the outset, to disprove his account that he’d acted to protect himself.

But thousands converged on Sanford to join in protests calling for Zimmerman’s arrest and criticizing the police department’s handling of the case. Martin’s death has triggered a nationwide debate about race in America and Florida’s “stand your ground” law, which allows people to use deadly force anywhere they feel a reasonable threat of death or serious injury.