Rigathi Gachagua and DCI Director Mohamed Amin in a composite image illustrating claims and counterclaims over Dr Victoria Mutiso’s murder. Photos: DCI, Rigathi Gachagua. Feel free to search the content on topics/people you enjoy reading about in the top right corner ;)When was Dr Mutiso shot dead? “The DCI has taken note of a litany of baseless and unsubstantiated allegations by the former Deputy President, Rigathi Gachagua, touching on the DCI,” the agency said. Dr Victoria Mutiso was shot dead in Nairobi’s Upper Hill area on July 29.