A St. Louis couple has been charged with felony unlawful use of a weapon for brandishing guns during civil rights demonstrations outside their mansion last month.

The protests began peacefully on Friday over an ex-officer's acquittal.

The announcement came on Monday amid a fourth day of protests in St. Louis.

Stockley was acquitted of murder in the shooting death of Anthony Lamar Smith.

They talk about why they participate and gains since Ferguson.

In a different scene from earlier violence, demonstrators peacefully marched arm in arm.

The protests began peacefully on Friday over an ex-officer's acquittal.

ABC News' Kenneth Moton reports from silent march on fourth day of unrest in the city.

The violence was ignited by a judge's acquittal of former police officer Jason Stockley in the 2011 killing of a black man, Anthony Lamar Smith.

The city erupted in protest Friday after an ex-cop was acquitted for a killing.

White cop was found not guilty of murder in fatal shooting of black man.

Ten police offers injured after hundreds of protesters gathered to express outrage after the acquittal of a former white officer in the 2011 fatal shooting of Anthony Smith, who was black.

Video tweeted out by the city's police department shows individuals jumping on the hood of a police SUV and shattering the windshield.

Jason Stockley was acquitted in the 2011 shooting death of Anthony Lamar Smith.

Jason Stockley was acquitted in the 2011 shooting death of Anthony Lamar Smith.