WATCH: St. Louis Police Bowl Over Older Woman

Protestors clashed with St. Louis police Friday after the acquittal of a white police officer charged with the murder of a black motorist in a 2011 shooting. One video caught riot police bowling over an older woman as they attempted to quell demonstrations.

Rallys began peacefully but they grew more violent as the day progressed.

Some protesters and police officers skirmished around the city. Protesters threw bricks and bottles at police officers who used tear gas and rubber bullets to suppress the crowds. One woman was knocked down by police and stepped over in the violence.

A group of protesters surrounded St. Louis Mayor Lyda Krewson's home and smashed several windows and threw paint at the building. Krewson did not appear home, according to the St. Louis Dispatch.

Acting Police Commissioner Lawrence O’Toole said in a statement posted to Twitter that 10 police officers were injured throughout the day and 32 people were arrested in the protests.

“Many of the demonstrators were peaceful,” O'Toole said in the statement he made alongside Krewson. “However, after dark, many agitators began to destroy property and assault police officers.”

A library and several restaurants were damaged in addition to the mayor’s home.

“Orders to disperse were given numerous times,” O'Toole said. “Tear gas was deployed after officers were assaulted with bricks and bottles. Officers did deploy pepper balls as a less-than-lethal option after agitators continued to assault officers with objects and destroy property.”

On Friday a judge acquitted former St. Louis police officer Jason Stockley for the shooting death of Anthony Lamar Smith in December 2011. Smith was killed after a high-speed chase with police.

Per court documents the investigator on the case said that Stockley said “going to kill this motherf‑‑‑-r, don't you know it” at some point during the chase, instructed the officer driving in the chase to hit Smith’s car as it slowed and then got out and fired five shots into Smith’s car. Prosecutors also accused Stockley of planting a gun on Smith.

The case was decided in a bench trial. Judge Timothy Wilson, the circuit judge hearing the trial, acquitted Stockley because he said he wasn’t convinced by the prosecution that Stockley “did not act in self-defense.”