potentially investigate certain individuals, apparently including Giuliani, on numerous potential charges, including money laundering, obstruction of justice, conspiracy to defraud the United States, making false statements to the federal government, and mail/wire fraud. Parnas and Fruman were arrested for campaign finance violations while attempting to board a one-way flight to Frankfurt from Washington Dulles International Airport on October 9, 2019. Giuliani was paid $500,000 to consult for Lev Parnas's company named "Fraud Guarantee". Republican donor and Trump supporter Long Island attorney Charles Gucciardo paid Giuliani on behalf of Fraud Guarantee in two $250,000 payments, in September and October 2018. Fruman eventually pled guilty in September 2021 to having solicited a contribution by a foreign national. In May 2019, Giuliani described Ukraine's chief prosecutor Yuriy Lutsenko as a "much more honest guy" than his predecessor, Viktor Shokin. After Lutsenko was removed from office, he said in September 2019 that he found no evidence of wrongdoing by the Bidens, and that he had met Giuliani about ten times. Giuliani then reversed his stance, saying that Shokin is the one people "should have spoken to", while Lutsenko acted "corruptly" and "is exactly the prosecutor that Joe Biden put in in order to tank the case". In September 2019, as reports surfaced that a whistleblower was alleging high-level misconduct related to Ukraine, Giuliani went on CNN to discuss the story. When asked if he had tried to get Ukrainian officials to investigate Biden, he initially replied "No, actually I didn't," but thirty seconds later said, "Of course I did." In a later tweet he seemed to confirm reports that Trump had withheld military assistance funds scheduled for Ukraine unless they carried out the investigation. He said, "The reality is that the president of the United States, whoever he is, has every right to tell the president of another country you better straighten out the corruption in your country if you want me to give you a lot of money. If you're so damn corrupt that you can't investigate allegationsour money is going to get squandered." Tom Bossert, a former Homeland Security Advisor in the Trump administration, described Giuliani's theory that Ukraine was involved in 2016 U.S. election interference as "debunked"; Giuliani responded that Bossert "doesn't know what the hell he's talking about". On September 30, 2019, the House Intelligence Committee issued a subpoena to Giuliani asking him to release documents concerning the Ukraine scandal