A lawyer hired by the Christie administration announced Thursday that New Jersey Gov. Chris Christie had no foreknowledge about lane closures on the George Washington Bridge last year. The scandal, dubbed "Bridgegate," involved two of Christie's aides who were found to have ordered the lanes to be closed in order to create gridlock in Fort Lee, N.J.

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The closures were linked to political retribution after the Fort Lee mayor declined to support Christie's re-election campaign.

"We found that Gov. Christie had no knowledge beforehand of this George Washington Bridge realignment idea," Randy Mastro said, adding he could not uncover "a shred of evidence" pointing to Christie's involvement in the scheme.

This morning on America's Newsroom, Mastro was pressed by Martha MacCallum on whether he had any prior relationship with Christie. She pointed out that Mastro had previous ties to Rudy Giuliani, a big supporter of Christie, serving as the former New York City mayor's deputy.

Mastro said he had never met Christie until January when his firm was hired to conduct the investigation.

"I had never spoken to him before that, never met him before that," said Mastro, pointing out that he's a "lifelong Democrat" and has worked with many other prominent Democrats, including current NYC Mayor Bill de Blasio.

MacCallum highlighted the fact that there are separate state and federal investigations of "Bridgegate," asking Mastro whether he's confident that his findings will hold up.

"I'm confident because we followed the evidence and the facts. And the facts tell us that Governor Christie had no knowledge of this lane realignment decision before it was made and he played no role whatsoever in the decision to realign these lanes," said Mastro.

Watch the rest of the interview above.

Tune in to Fox News Channel today at 2:30p ET as Christie holds a news conference on the new report. Plus, he'll sit down with Megyn Kelly in a must-see cable exclusive, tonight at 9p/12a ET on The Kelly File.