1. Violent demonstrations refer to demonstration events in which the demonstrators themselves engage in violently disruptive and/or destructive acts targeting other individuals, property, businesses, other rioting groups, or armed actors;Roudabeh Kishi;Demonstrations & Political Violence in America: New Data for Summer,2020
2. We Reviewed Police Tactics Seen in Nearly 400 Protest Videos. Here's What We Found;See Talia Buford;PROPUBLICA,2020