had both thwarted Ukraine's investigation into Kilimink and allowed Kilimnik to leave Ukraine for Russia. Began in 2017, four investigations into Paul Manafort by the Head of the Special Investigation Department of the Prosecutor General's Office Ukraine Serhiy Horbatyuk were frozen by Lutsenko in April 2018. In January 2018 Horbatyuk sent a letter to Mueller offering to cooperate with leads and evidence, however, Horbatyuk received no return letter from Mueller's special prosecuting team. One investigation using subpoenaed records from banks in Ukraine involved Ukrainian shell company payments to Manafort. Revealed in 2016 by Serhiy Leshchenko, who gave the records to the National Anti-Corruption Bureau, the secret bookkeeping of Viktor Yanukovych and the Party of Regions' Black Ledger or Barn Book involved another investigation into Manafort in which the handwritten records of 22 payments to Manafort, nine of which had been signed by Vitaly Kalyuzhny who was the Verkhovna Rada's foreign relations committee chairman. Two other investigations of Manafort involve the Skadden Arps law firm's report to imprison Yulia Tymoshenko. The National Anti-Corruption Bureau informed the United States Department of State that Lutsenko had thwarted both Ukraine's investigation into Manafort and Mueller's investigations into Manafort. After Ukrainian politician and activist Kateryna Handziuk died from complications from an acid attack on 4 November 2018, human rights organisations and NGOs demanded the resignation of Lutsenko and Interior Minister Arsen Avakov. "To prove that no one clings to power", Lutsenko announced his intention to resign as Prosecutor General on 6 November 2018. He stated he considered the investigation of the case effective and that he was outraged by what he considered "'PR on blood' around the Handziuk case". On 9 November 2018, President Petro Poroshenko refused to approve Lutsenko's resignation. Documents, provided by Lev Parnas to the U.S. House Intelligence Committee, outlined text exchanges in which Lutsenko pushed for the ouster of then U.S. Ambassador to Ukraine Marie Yovanovitch and offered information related to former U.S. Vice President Joe Biden in return. It is thought that Lutsenko targeted Yovanovitch due to her anti-corruption efforts in Ukraine. Following the 2019 Ukrainian parliamentary election, Lutsenko was dismissed by the Verkhovna Rada on 29 August 2019, and replaced by Ruslan Riaboshapka. Implication in Trump-Ukraine Scandal In 2019, Lutsenko was a central figure in the Trump–Ukraine scandal after he met multiple times with Rudy Giuliani, who at the time was US President Donald Trump's personal lawyer, to try