this man, self-declared rebel general maurice bacala, when they first disappeared in march robert thought his brother might be in prison. >> if he was in prison, i would have been able to take him coffee, cigarettes and food. but from the 24th of march until today i have not heard his voice or seen him and that definitely means he's dead. >> reporter: in march an african union peace keeper was killed here. soldiers then turned up at the rebel general's house. this is the last place the general and his family were seen alive. witnesses say, peace keepers from congo base here took them away. the youngest person in the group was less than a year old. the african union has replaced the contingent in voale with these men. they are also from con dpo congo brazeville. six months on there has been no conclusive investigation. but the u.n. says its new mission will be different. >> the united nations has a zero tolerance policy for any violation of any sort. and that i have briefed the earn contingent commanders that includes of course sexual behavior but i think human rights in its globallity is