 Mondlane 's immediate successor was the moderate Rev. <unk> Simango , who had served under him , as FRELIMO 's vice @-@ President , from its formation until 1969 . In the post @-@ assassination power @-@ struggle , Simango was ousted by the more hardline Samora Machel and <unk> dos Santos , expelled from FRELIMO and eventually arrested and executed , post @-@ Independence , in 1975 . 
