Law enforcement attempts to control unruly crowds have come under increased scrutiny in light of recent unrest in Ferguson, Missouri; Baltimore, Maryland; and other locales across the United States. Resultant criticism is forcing law enforcement agencies nationwide to review their civil-unrest policies. Crowd behavior resulting from police actions is an important component of crowd control. Viewing crowds from a systems perspective, as done in this thesis, provides powerful new insights to help law enforcement assess potential crowd behaviors. Through this new awareness, this thesis makes recommendations regarding policies, training, and equipment that law enforcement can use to make better-informed decisions related to crowd control.http://archive.org/details/crowdsscomplexda1094548549Lieutenant, Massachusetts State PoliceApproved for public release; distribution is unlimited
