The exculpatory evidence is reportedly Papadopolous denying having any contact with Russians in order to find "dirt" on Hillary Clinton.
The sources also said the review is taking a closer look at the actual start date of the original FBI investigation into potential collusion between members of the Trump campaign and the Russians, as some allege the probe began earlier than thought. Both components are considered key in the review currently being led by Attorney General Bill Barr and U.S. Attorney from Connecticut John Durham -- an effort sure to draw more attention in the coming weeks and months now that Robert Mueller's testimony is in the rearview.
The recordings in question pertain to conversations between government sources and Papadopoulos, which were memorialized in transcripts. One source told Fox News that Barr and Durham are reviewing why the material was left out of applications to surveil another former Trump campaign aide, Carter Page.
“I think it’s the smoking gun,” the source said.
“These recordings have exculpatory evidence,” the other source added. “It is standard tradecraft to record conversations with someone like Papadopoulos—especially when they are overseas and there are no restrictions.”