Ukrainian parliament member Andrii Derkach has released audio recordings purportedly revealing private conversations between former Ukraine President Petro Poroshenko and former U.S. Vice President Joe Biden.

In the audio posted to YouTube, the two discuss then-prosecutor Viktor Shokin’s resignation in exchange for $1 Billion in U.S. loan guarantees, as previously admitted by Joe Biden in a public interview (below).

At the time, Shokin was probing Burisma, a Ukrainian energy company that employed Hunter Biden, the Vice President’s son, to sit on its board.

In the audio, Poroshenko admits there was no evidence of wrongdoing by Prosecutor Shokin—but Biden insisted he be fired.

“And I’m a man of my word,” Biden says. “And now that the new Prosecutor General is in place, we’re ready to move forward to signing that one billion dollar loan guarantee.”