former vietnamese official germany say kidnap berlin face charge hanoi financial losses state construction firm clear wrongdoing previous government accord document see reuters decision re-open case aggressively pursue prosecution show tough stance take rule communist party since vietnam security establishment emerge strong power struggle last year ex-prime minister nguyen tan dung lose party say want tackle corruption critics accuse vietnam rulers embark witch-hunt follow launch investigations implicate increasingly senior figure internal crackdown draw global attention last month germany accuse hanoi kidnap trinh xuan thanh former official state oil firm petrovietnam accuse financial mismanagement cause losses 150 million petrovietnam construction pvc time serve chairman 2009 2013. accord letter date may 18 2015 trade minister vu huy hoang prime minister dung official state responsibility government find negative sign relate action therefore authorize agencies units agree take disciplinary action thanh say note move role trade ministry work hard try resolve problems petrovietnam construction corrective work post-inspection handle pvc do effectively accordance prime minister requirements letter say respond question letter whether would prosecutions case foreign ministry spokeswoman le thi thu hang say party state resolute deal corruption lawbreaking organization individual base result investigation functional agencies shall strictly handle violate law accordance provision vietnamese law tell reuters reuters unable contact thanh former trade minister hoang former prime minister dung either directly government offices thanh run petrovietnam construction subsidiary sprawl state enterprise also involve everything oil gas power generation ship build insurance return vietnam thanh show state television say decide surrender order face justice government say return home thanh relatively junior figure among investigation relation petrovietnam deal well bank sector senior political casualty far dinh la thang former petrovietnam chairman sack role politburo vice-minister responsible appoint thanh also sack hoang also symbolically strip title former trade minister violate state party rule investigations continue petrovietnam trade ministry oversee well central bank widespread expectations members dung administration prosecute dung lose last year battle secure post communist party general secretary vietnam powerful position post remain hand nguyen phu trong whose modest public profile contrast conspicuous wealth members dung administration display fight prevent corruption waste negativity long handle slowly case case become movement trong say july accord survey transparency international conduct july 2015 january 2017 vietnam become bribery prone country asia india majority vietnamese believe corruption worsen exclusive scandal-hit vietnam official clear previous government