Police use chemical irritants and crowd control munitions to disperse protesters during a demonstration in Portland, Ore., Saturday, Sept. 5, 2020. Hundreds of people gathered for rallies and marches against police violence and racial injustice Saturday night in Portland, Oregon, as often violent nightly demonstrations that have happened for 100 days since George Floyd was killed showed no signs of ceasing (photo by Noah Berger / AP).

hottopic_teargas_lawsuit-Police_Group

Police use chemical irritants and crowd control munitions to disperse protesters during a demonstration in Portland, Ore., Saturday, Sept. 5, 2020. Hundreds of people gathered for rallies and marches against police violence and racial injustice Saturday night in Portland, Oregon, as often violent nightly demonstrations that have happened for 100 days since George Floyd was killed showed no signs of ceasing.

Noah Berger / AP