 Derby-Lewis was tied to the murder of Chris Hani due to his conspiracy with Janusz Waluś for the murder of key anti-apartheid members, and the supply of the handgun used in the assassination of Chris Hani.His motivations for his involvement are believed to be due to a political race between the ANC and the Conservative Party who were expected to be dominant parties during the reformation of the South African democracy during the proposed upcoming elections in 1994.After their arrest both Waluś and Derby-Lewis were convicted by his Lordship Mr Justice Eloff in the Supreme Court of Johannesburg and were sentenced to death.