FERGUSON, Mo. -- Missouri Governor Jay Nixon declared a state of emergency and curfew in Ferguson, Mo., on Saturday, following nights of protests after 18-year-old Michael Brown was shot and killed by a police officer.
'If we're going to have justice, we must first have and maintain peace,' Nixon said at a Saturday afternoon press conference. 'The eyes of the world are watching.'
Captain Ron Johnson of the Missouri State Highway Patrol says the curfew will run from midnight to 5 a.m. local time Sunday and will be enforced through conversations not tear gas and tanks.
'We will survive this and will make a change,' Johnson says.
FBI agents have joined local authorities in some witness interviews related to the fatal shooting of Michael Brown by a Ferguson, Mo., police officer, after those witnesses expressed doubts about the integrity of the local inquiry, a federal law enforcement official said Saturday.
The official, who is not authorized to comment publicly, said the joint interviews have involved few witnesses so far. But the concerns echo themes from waves of protesters during the past week who have cited a broken trust with local police.
Local authorities are heading the investigation into last week's deadly shooting, while the FBI is conducting a parallel inquiry into possible federal civil rights violations.
In a statement issued Friday evening, William Woods, the FBI's special agent in charge, U.S. Attorney Richard Callahan and Molly Moran, acting chief of the Justice Department's Civil Rights Division confirmed that federal authorities had already conducted 'several'' witness interviews.
'Over the next several days, teams of FBI agents will be canvassing the neighborhood where the shooting took place to identify any individuals who may have information related to the shooting and have not yet come forward,'' the officials said.
The developments came after armored vehicles, riot gear, tear gas and looting returned to Ferguson early Saturday as a brief period of peaceful demonstrations gave way to a violent atmosphere of anarchy.
The intense night shattered a short-lived calm that had been hailed as a turning point after a week of protests following the fatal shooting of Brown, a black unarmed teenager killed by Darren Wilson one week ago.
DiBlasio reported from McLean, Va. Contributing: Kevin Johnson