Mr Bratton's biggest achievement, she says, has been to turn the LAPD's old “warrior culture” into “policing as something not done to people but with people.

Mr Bratton's biggest achievement, she says, has been to turn the LAPD's old "warrior culture" into "policing as something not done to people but with people."

They're in the series because he wanted to define their culture, to explore the foundations of this warrior faction.