Outside of a war zone, South Africa is one of the most dangerous places in the world. The country’s murder rate is now at a 20-year high. With trust in the police falling, communities say they have no option but to defend themselves. BBC Africa Eye’s Ayanda Charlie joins two volunteer units, a team of farmers near Pretoria, and a group in Diepsloot, a poor township near Johannesburg. We see the risks they take, and ask who holds patrols accountable.