A police riot is a riot carried out by the police; more specifically, it is a riot that police are responsible for instigating, escalating or sustaining as a violent confrontation. Police riots are often characterized by widespread police brutality, and they may be done for the purpose of political repression. The term "police riot" was popularized after its use in the Walker Report, which investigated the events surrounding the 1968 Democratic National Convention in Chicago to describe the "unrestrained and indiscriminate" violence that Chicago Police Department officers "inflicted upon persons who had broken no law, disobeyed no order, made no threat." During the 2020 George Floyd protests, columnist Jamelle Bouie wrote in The New York Times that a police riot is "an assertion of power and impunity" that "does more to inflame and agitate protesters than it does to calm the situation and bring order to the streets." History United States Haymarket Riot During the early years of labor union organizing, police violence was frequently used in efforts to quell protesting workers. One notable incident took place in May 1886, when police killed four striking workers at the McCormick Harvesting Machine Co. in Chicago. The following day, a peaceful demonstration in Haymarket Square erupted in violence when a bomb was thrown, killing eight policemen. Other police then opened fire, before or after they were fired on by people in the crowd (accounts vary) killing at least four demonstrators and wounding an undetermined number, in an event known as the Haymarket Riot; the events have been referred to as a police riot. Bloody Thursday In July 1934, police in San Francisco were involved in several encounters with striking longshore workers. After two picketers were killed, the other area unions joined together and called a general strike of all workers (the "Big Strike"). Subsequent criticism of the police was probably the occasion for the coining of the term "police riot". Vietnam War protests During the Vietnam War, anti-war demonstrators frequently clashed with police, who were equipped with billy clubs and tear gas. The demonstrators claimed that the attacks were unprovoked; the authorities claimed the demonstrators were rioting. The most notorious of these assaults, which was shown on television and which included national television reporters in the chaos, took place during the August 1968 Democratic National Convention in Chicago, which was the scene of significant anti-war street protests. The actions of the police