WATCH: St Louis cops trample elderly woman then handcuff her during police brutality protest

Riot police trampled an elderly woman in St. Louis as activists poured into the streets to protest a white former officer's acquittal for the shooting death of a black man.

Judge Timothy Wilson ruled that an audio recording of Stockley declaration that he was going to "kill this motherf*cker" was only an "ambiguous" statement that was not a definite desire to kill.

During the protests that followed, multiple camera angles show shocking video of riot police trampling a white-haired woman.

Fox 2 captured aerial footage of the incident:

A second image captures the mauling from the ground:

Witnesses claim the woman was arrested.

Another round of protests are expected this evening, resulting in the cancellation of a Live Nation concert featuring U2.

"We have been informed by the St. Louis Police Department that they are not in a position to provide the standard protection for our audience as would be expected for an event of this size," U2 and Live Nation said in a joint statement.