The Savage Hour by Elaine Proctor
De Wildt, South Africa.
Ouma is a white doctor running her own farm in the rural backwaters. Over eighty years old, she has seen apartheid rise and fall, but treats everyone - man and woman, black and white - with the same fierce respect and hard-won wisdom.
Until the day she is found drowned in the dam on her own land.
At first, only her granddaughter suspects anything other than an accident. But as the shockwaves spread, the fractures follow - exposing family, police, and a whole community on the edge of a harsh world - that needs only a push to fall into savagery.