From criminal to ‘teacher’: the ex-gangster tackling crime in Nairobi

One of the city's most wanted, Peter Wainaina was given a second chance and used it to turn his life around and help others find different path out of poverty

At the entrance of Kibagare, a slum in Nairobi's outskirts, boots of dead gangsters dangle from electricity wires that hover over ramshackle homes of wood and iron sheets.

With little state protection from crime, angry local people will often take the law into their own hands and beat an offender who is caught in the act, sometimes to death.