In announcing the curfew, Nixon said that though many protesters were making themselves heard peacefully, the state would not allow looters to endanger the community.
“We must first have and maintain peace. This is a test. The eyes of the world are watching,” Nixon said during a news conference that was interrupted repeatedly by people objecting to the curfew and demanding Wilson be charged with murder.
Meanwhile, Nixon said the U.S. Department of Justice is beefing up its civil rights investigation of the shooting. Johnson said 40 FBI agents were going door-to-door in the neighborhood gathering information about the shooting.
Johnson said earlier Saturday that police would not enforce the curfew with armored trucks and tear gas but would communicate with protesters and give them ample opportunity to leave. Local officers faced strong criticism earlier in the week for their use of tear gas and rubber bullets against protesters.
But as the curfew deadline arrived early Sunday, remaining protesters refused to leave the area as officers spoke through a loudspeaker: “You are in violation of a state-imposed curfew. You must disperse immediately.”
As officers put on gas masks, a chant from the distant crowd emerged: “We have the right to assemble peacefully.”
A moment later, police began firing canisters into the crowd. Highway Patrol Spokesman Lt. John Hotz initially said police only used smoke, but later told The Associated Press they also used tear gas canisters.
“Obviously, we’re trying to give them every opportunity to comply with the curfew,” Hotz said.
On Saturday, some residents said it appeared the violent acts were being committed by people from other suburbs or states.
“Who would burn down their own backyard?” asked Rebecca McCloud, a local who works with the Sonshine Baptist Church in St. Louis. “These people aren’t from here. They came to burn down our city and leave.”
Wilson, the officer who shot Brown, is a six-year police veteran who had no previous complaints against him, Jackson has said. The Ferguson Police Department has refused to say anything about Wilson’s whereabouts, and Associated Press reporters were unable to contact him at any addresses or phone numbers listed under that name in the St. Louis area.
Wilson has been on paid administrative leave since the shooting. St. Louis County prosecutor Bob McCulloch said it could be weeks before the investigation wraps up.