The ACLU of Missouri filed a lawsuit against the city of St. Louis and St. Clair County, Ill., for police misconduct during protests following the killing of Mansur Ball-Bey by a St. Louis Metropolitan Police Department officer in 2015.
Officers engaged in retaliation and used excessive force by deploying tear gas and pepper spray at protesters and observers long after the demonstration had dispersed.
The incident happened on August 19, 2015, the same day St. Louis police officer Kyle Chandler killed 18-year-old Mansur Ball-Bey in St. Louis’ Fountain Park neighborhood
Find the Legal Glossary here: https://www.aclu-mo.org/en/node/124