Nightline Africa: Three former Malawi presidents demand an independent investigation and subsequent prosecution against those involved in violence meted out against protesters. Namibian political parties campaign ahead of the coming November 27 presidential and legislative elections. The latest opinion poll shows Ghana's main opposition leader and former president John Dramani Mahama ahead in the coming presidential contest. Plus, A Nigeria civil society group calls on President Bola Tinubu to take a firm public stand against corruption by stating his commitment to end graft and wrongdoing. In Guinea Conakry, a coalition of political parties and civil organizations urge the military to join the public to demand the departure of the ruling military junta if it fails to return the country to civilian rule by December 31st. For all this and more tune in Nightline Africa.