A violent public crowd disorder
Civil 
disorder is also described as any public disturbance involving acts of violence 
by assemblages of three or ... "Crowds can be classified into four general 
categories: Casual crowd- A... [DOC] [TLE] Preventing Crowd Violence - Center for Problem-Oriented Policing [PAR] From Crisis to Opportunity: New Crowd Psychology and Public Order Policing .... 
widely varied levels of property damage, violence and public disorder.