This morning, Giuliani told me he’d have to reschedule our lunch. I’ve tried to reach him since then, to discuss Parnas’s and Fruman’s arrests, among other things, to no avail. When I called at 3 p.m. ET to ask about his Vienna trip, a woman claiming to be his communications director answered the phone. I have called him more than 100 times over the past year, and this is the first time that has ever happened. She said she’d have to get back to me. As we spoke, I could hear a voice that resembled Giuliani’s shout “asshole” in the background. “Oh, sorry,” the woman told me. “He was talking to the TV.”

Why were Parnas and Fruman bound for Vienna? Why was Giuliani—if what he told me was true—planning to be in the same city a day later?

Giuliani finally sent me a text message at 4:18 p.m. ET: “I can’t comment on it at this time.”

Read: Rudy Giuliani: ‘You should be happy for your country that I uncovered this’

Parnas and Fruman, both Soviet-born, have been instrumental in helping Giuliani develop Ukrainian contacts in his quest to prove that Biden, while vice president, tried to curtail an investigation into a Ukrainian gas company for which his son Hunter Biden served on the board. Parnas told NPR, for example, that he was the one who had arranged a Skype call between Giuliani and former Ukrainian Prosecutor General Viktor Shokin to discuss their corruption theory. Parnas was also present at meetings in New York and Warsaw earlier this year with Giuliani and Yuriy Lutsenko, another former prosecutor general for Ukraine.

I met Parnas and Fruman in March, when I joined Giuliani at Shelly’s Back Room, a cigar bar in D.C., to discuss Special Counsel Robert Mueller’s soon-to-be-released report on Russian interference in the 2016 election. Sipping back-to-back glasses of Macallan—double, one large ice cube—and smoking a Nicaraguan cigar, Giuliani told me he’d known Parnas for two years. Parnas laughed and said he’d grown up “idolizing” Giuliani. They bantered about how the Mueller probe would likely amount to nothing, with Parnas adding that it was Trump’s “constitutional right” to fire former FBI Director James Comey. Save for introducing himself when I arrived, Fruman was quiet. Parnas told me they were all “great friends” and all “work together.”

Along with allegedly using a shell company to donate hundreds of thousands of dollars to Republican candidates and a pro-Trump super PAC, Parnas and Fruman were also accused by federal prosectors of meddling in American political activities on behalf of one or more Ukrainian officials. In the 21-page indictment, prosecutors allege that Parnas and Fruman lobbied for the removal of the U.S. ambassador in Kiev, Marie Yovanovitch—something Giuliani sought as well, arguing that she was biased against the president. In May, Trump ordered Yovanovitch’s removal.