Billy Downer

William John Downer SC (born 1956) is a retired South African prosecutor. A specialist in commercial crime, he is best known for his prosecution of high-profile public corruption cases, especially the Arms Deal prosecutions of former President Jacob Zuma and his financial adviser Schabir Shaik.

Early life and education Downer was born in 1956 in suburban Pretoria, where he attended Pretoria Boys High School. His parents were middle-class United Party supporters; his mother was a physiotherapist and his father, formerly a colonel in the South African Air Force, was a manager at the law firm Adams & Adams. However, after matriculating, he attended Stellenbosch University, where he lived at Dagbreek and completed a law degree in 1979.

Career as a prosecutor Downer was admitted as an advocate in the Pretoria High Court in 1980, with a family friend, Frank Kirk-Cohen, appearing for him. He retired in 2021.

Jacob Zuma prosecution

Downer is best known to the public for his role in prosecuting former President Jacob Zuma on fraud and corruption charges related to the 1999 Arms Deal. Downer was appointed to the Arms Deal investigation in 2000, while Zuma was the Deputy President, and he initially focused on the leg of the investigation that targeted Chippy Shaik and Schabir Shaik. Meanwhile, when related charges were brought against Zuma, he was also made the leading prosecutor on the Zuma case. Journalist Sam Sole claimed that state agents surveilled his private telephone conversations with Downer about the case.

The prosecution of Zuma has taken many years with Zuma having been accused of using Stalingrad tactics to evade his day in court. Zuma objected to Downer's involvement in his case and claimed that the retired prosecutor acted unlawfully by leaking information to the media. Downer has previously been accused of leaking information to journalists to benefit his public image and his cases. Zuma instituted a private prosecution in the high court against Downer on 5 September 2022, as well as against journalist Karyn Maughan, but in April 2024 this prosecution was struck off the roll of the KwaZulu-Natal Division of the High Court in Pietermaritzburg, although it might be reinstated if an appeal by Zuma to the Constitutional Court succeeds.

Personal life Downer lives with his partner, lawyer William de Villiers, in Cape Town. They married in 2009.