In 1991 , after the fall of the last derg leader , mengistu haile mariam , the 36-year-old mr meles ( pictured above ) took power , becoming africa 's youngest leader .
When mrmengistu fell and fled in 1991 , he left behind thousands of pages of memoranda , death warrants and even the minutes of a meeting in 1975 when his rulingcommittee , known as the derg , voted to murder the imprisoned emperor , haileselassie .