Louis Theroux’s powerful series examining three American cities ravaged by crime and drugs concludes with a visit to Milwaukee, which has a shockingly high rate of gun incidents.

He joins the city’s police as they patrol District 5, an area with a homicide rate that’s way above the national average, and Louis is appalled to witness the immediate aftermath of a murder.

He also meets a community activist who has left a gang and turned her life around, and accompanies police as they attend what could turn out to be an incident of self-defence.

Devastating, shocking viewing with some graphic scenes