One of the most impoverished and racially divided cities in the US, Milwaukee has an incredibly high gun crime and homicide rate.
Louis heads to the city to spend time with the Police Department and joins them on their patrol of District 5 – an area in which homicide is twelve times higher than the national average.
He spends time with a family dealing with a recent loss due to gun crime and chats to a former gang leader, now turned activist, as to the seriousness of the situation.
Arriving at a time of heightened tension between the police and the African-American community due to a recent police shooting, Louis hears from both sides of the debate and uncovers hope in a desperate city.
Louis Theroux: Dark States – Murder in Milwaukee, Sunday, 9 pm – BBC Two