Jason Stockley Protesters Bring Guns to St. Louis Demonstrations and Police Arrest Dozens

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Demonstrators confront police officers on September 16 while protesting the acquittal of former St. Louis police officer Jason Stockley in the killing of a black man, Anthony Lamar Smith. Getty Images

Updated | Police in St. Louis confiscated firearms from someone the department described as a "rioter" and arrested more than 80 people Sunday amid ongoing protests related to the police killing of a black man, Anthony Lamar Smith.

Some police officers were reportedly chanting "whose streets, our streets" after making arrests. The phrase is commonly chanted by demonstrators, especially those associated with the Black Lives Matter movement.

Police just chanted "Whose Streets, our streets" on Tucker Blvd after making arrests

— David Carson (@PDPJ) September 18, 2017

"People setting out to do damage are being arrested, and these criminals we've arrested should be held accountable and prosecuted to the fullest extent of the law," St. Louis's interim police chief, Lawrence O'Toole, said at a briefing on Monday morning.

Mayor Lyda Krewson said the destruction of property is "not acceptable" but also described the "vast majority" of protesters as "nonviolent."

Officers confiscate weapons, guns, protective gear from a rioter. Suspect was taken into custody. #StLVerdict pic.twitter.com/2rObBhQHu8

— St. Louis, MO Police (@SLMPD) September 18, 2017

SLMPD Media briefing https://t.co/33m7P6bzKf

— St. Louis, MO Police (@SLMPD) September 18, 2017

Windows shattered, more damage on Olive including @BaileysRange. Dave Bailey was just out in the Loop helping those businesses clean up. pic.twitter.com/GC7Qjil0uB

— Alexis Zotos (@alexiszotos) September 18, 2017

Protests over the not guilty verdict for ex-officer Jason Stockley began peacefully on Friday but reportedly escalated on Saturday as some demonstrators began throwing rocks at police and damaging property. Dozens were arrested across the weekend.

At least one firearm was discovered by St. Louis police on Friday, and five weapons were confiscated Saturday.

This firearm was recovered from the Central West End during tonight's demonstrations. #STLVerdict pic.twitter.com/io9HXP8TAr

— St. Louis, MO Police (@SLMPD) September 16, 2017

Regarding the confiscation of firearms during the protests, police critics have noted that Missouri is an open carry state.

FYI for context: Missouri is an open carry state. Don't even need a permit. https://t.co/oB6qf9ODRQ

— Emerald Morrow (@EmeraldMorrow) September 16, 2017

Guess you should file a complaint with your local lawmakers who made Missouri an open carry state https://t.co/4jtbHRwIdL

— Jess Dweck (@TheDweck) September 16, 2017

Stockley, 36, fatally shot Smith, 24, after a high-speed car chase in 2011 that allegedly began following a drug transaction. Moments before fatally shooting Smith, a video from a dashboard camera recorded Stockley saying, "We're killing this [expletive deleted], don't you know."

A gun was found in Smith's car, but prosecutors alleged Stockley planted it there. Stockley's DNA was found on the weapon; Smith's wasn't.

As Stockley exited his vehicle, he carried both his police-issued handgun and a personal AK-47 pistol. It was against department policy for Stockley to carry the personal firearm.

Ultimately, Judge Timothy Wilson found Stockley not guilty of first-degree murder and armed criminal action. Wilson said the prosecutors failed to prove Stockley had not acted in self-defense.

Protests over the Stockley verdict were expected to continue in St. Louis on Monday.

This article has been updated with reports that some police officers were chanting "whose streets, our streets.