The Ferguson grand jury has concluded its work and found "no probable cause" to indict Officer Darren Wilson on any of the charges it was considering.

St. Louis County Prosecuting Attorney Robert McCulloch is currently giving remarks. He began his press conference by stressing the long and laborious job the grand jurors have had.

"The most significant challenge has been the 24-hour news cycle, followed closely by rumors on social media," he said.

Evidence presentation started Aug 20. All jurors were present for every session, and examined all evidence.  McCulloch noted that the grand jurors are the only persons to have examined all evidence, witness statements and other materials germane to the case.

The jurors were "extremely engaged," he said. They met for a total of 25 days, reviewing material and evidence for more than 70 hours. They heard from more than 60 witnesses and heard hours of interviews and media reports, he said. They heard from three medical examiners.

McCulloch said some witnesses gave early statements to either authorities or media reporters that were not supported by evidence.

"The duty of the GJ is to separate fact from fiction," he said.

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