Political Era: police jobs are favors, non existent supervision, high turnover
technology were foot beats and call boxes, hostility and physical force against public
Professional Era: Reaction to political corruption Technology: two way radio patrol cars and telephones, Racial Ethnic Tension
Community Era: Police work with the public, decentralization, zero tolerance, community policing, crime mapping hot spots, problem orientated policing,
Homeland Security: Post 9/11, modeled after home office in Britain focus on threats, shared intelligence: talk to different countries talk and terrorism fusion center