UPDATED at 6:40 p.m. with the Rev. Al Sharpton coming to St. Louis for Tuesday press conference.
CLAYTON • A St. Louis County grand jury has reached a decision on whether to indict Ferguson police Officer Darren Wilson and officials will reveal it tonight.
The announcement will be made at 8 p.m. at the St. Louis County Justice Center in Clayton.
Prosecuting Attorney Robert McCulloch has pledged that if Wilson is not indicted, most of the evidence presented to grand jurors would be publicly released. An attorney for McCulloch's office says the prosecutor can do that under the Missouri Sunshine Law without a judge's order.
If there is an indictment, only the charging document would be revealed.
Michael Brown's family released a statement Monday afternoon, asking for 4½ minutes of silence in their son's memory. The timing of the silence is intended to symbolize the 4½ hours Brown's body remained on the street in the Canfield Green apartment complex after he was fatally shot.
“After the grand jury’s decision, we are asking for 4½ minutes of silence to remember why we lift our voices. We are not here to be violent. We are here in memory of our son. We are here for protection of all children. We are here to support justice and equality for all people. We lift our voices to ensure black and brown men, women, and children can live in this country without being devalued because of the color of our skin.”
The family plans a news conference for 11 a.m. Tuesday at the Greater St. Mark Family Church on Chambers Road near Ferguson, said family attorney Anthony Gray.
“In the meantime, the family wants to continue to urge everyone to remain peaceful, calm and non-violent during these times,” Gray said.
He said both of Brown’s parents are at their homes now. The mood, he said, is “numb silence.”
“Anticipation, anxiety is probably at the highest level it could be, without blowing a gasket,” he said.
According to the website of the National Action Network, the Rev. Al Sharpton will join Brown's family for their scheduled press conference tomorrow on the grand jury decision. He is also scheduled to hold a press conference tonight in New York at 8:15.
Around 1 p.m., the St. Louis County courthouse in Clayton had started to clear, with several clerks reporting that it was in anticipation of an announcement. Meanwhile, about 15 federal officers were stationed at the federal courthouse in East St. Louis, preparing for any potential unrest.
The St. Louis circuit court remained busy with activity. Public information officer Thom Gross said the circuit plans to operate as normal, although with the upcoming holiday, this was already a three-day week with no jury trials planned. He said the court has prepared for various contingencies should the situation change.
Protesters have been preparing to take to the streets if Wilson is not charged in the killing Aug. 9 of Michael Brown, 18. Police, likewise, have been readying a response, and Gov. Jay Nixon has called in the National Guard for extra protection of some locations.
Officials have said that Wilson ordered Brown and another man to stop walking in the street about noon that day and then realized they fit the description of two men suspected in a theft of cigarillos from a store a short distance away.
They said Wilson, 28, still in the police SUV, struggled with Brown through the open window and that at least one shot was fired from the officer's pistol, striking Brown in the thumb.
It is undisputed that Brown then ran and Wilson shot him, although witness accounts to reporters varied about whether Brown was surrendering and whether he was moving back toward the officer when he was hit with six or seven shots.
The killing triggered weeks of protests that drew international attention to tensions regarding race and police in general.
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