1 9 7 6 ▁to ▁ 1 7 ▁July ▁ 1 9 7 8 , ▁at ▁which ▁point ▁be ▁was ▁appointed ▁minister ▁of ▁the ▁government ' s ▁secret ariat . ▁President ▁David ▁D ack o ▁appointed ▁Bo z anga ▁Minister ▁of ▁Justice ▁on ▁ 1 6 ▁July ▁ 1 9 8 0 . ▁He ▁became ▁Prime ▁Minister ▁on ▁ 3 ▁April ▁ 1 9 8 1 . ▁He ▁was ▁critic ized ▁by ▁opposition ▁groups ▁about ▁the ▁ 1 9 8 1 ▁president ial ▁election , ▁spark ing ▁protest s ▁and ▁confront ation . ▁Bo z anga ▁was ▁critical ▁of ▁François ▁Mit ter rand ' s ▁government ▁and ▁accused ▁France ▁of ▁inter vention ism . ▁Bo z anga ▁was ▁de posed ▁along ▁with ▁the ▁rest ▁of ▁the ▁government ▁by ▁General ▁André ▁Kol ing ba ▁in ▁the ▁coup ▁of ▁ 1 ▁September ▁ 1 9 8 1 . ▁ ▁Kol ing ba ▁appointed ▁Bo z anga ▁director ▁of ▁the ▁Soc ite ▁cent ra frica ine ▁des ▁hydro car b ures ▁in ▁April ▁ 1 9 8 2 , ▁and ▁he ▁served ▁until ▁January ▁ 1 9 8 4 . ▁Bo z anga ▁re - jo ined ▁the ▁Ministry ▁of ▁Foreign ▁Affairs ▁and ▁was ▁later ▁an ▁advis er ▁to ▁the ▁Court ▁of ▁App e als . ▁In ▁ 2 0 0 4 , ▁he ▁was ▁named ▁a ▁justice ▁of ▁the ▁Supreme ▁Court . ▁In ▁ 2 0 0 6 , ▁Bo z anga ▁was ▁appointed ▁by ▁President ▁François ▁Bo z iz é ▁the ▁chairman ▁of ▁the