In March 2012, a US charity launched a film to highlight the barbarity of a Ugandan warlord that became a viral hit. The organiser explains to Carole Cadwalladr why his campaign must continue
In March, as a viral video highlighted the atrocities of Ugandan warlord Joseph Kony, David Simpson stumbled across the mutilated bodies of 13 men. He is now in jail charged with their murder. Carole Cadwalladr spoke to him