The Directorate of Special Operations (DSO), commonly known as the Scorpions, was a specialised unit of the National Prosecuting Authority of South Africa formed by President Thabo Mbeki, tasked with investigating and prosecuting high-level and priority crimes including organised crime and corruption. An independent and multidisciplinary unit with a unique methodology which combined investigation, forensic intelligence, and prosecution, the Scorpions were known as an elite unit, and were involved in several extremely high-profile investigations, especially into the Arms Deal and into high-ranking African National Congress (ANC) politicians including Jackie Selebi, Jacob Zuma, and Tony Yengeni.