Mary Rich, the mother of slain DNC staffer Seth Rich, at a press conference on Aug. 1, 2016.

Michael Robinson Chavez/The Washington Post/Getty Images

The Fox News Channel and a wealthy supporter of President Trump worked in concert under the watchful eye of the White House to concoct a story about the murder of a young Democratic National Committee aide, according to a lawsuit filed Tuesday.

The explosive claim is part of the lawsuit filed against Fox News by Rod Wheeler, a longtime paid commentator for the news network. The suit was obtained exclusively by NPR.

Wheeler alleges Fox News and the Trump supporter intended to deflect public attention from growing concern about the administration's ties to the Russian government. His suit charges that a Fox News reporter created quotations out of thin air and attributed them to him to propel her story.

Fox's president of news, Jay Wallace, told NPR Monday there was no "concrete evidence" that Wheeler was misquoted by the reporter, Malia Zimmerman. The news executive did not address a question about the story's allegedly partisan origins. Fox News declined to allow Zimmerman to comment for this story.

The story, which first aired in May, was retracted by Fox News a week later. Fox News has, to date, taken no action in response to what it said was a failure to adhere to the network's standards.

The lawsuit focuses particular attention on the role of the Trump supporter, Ed Butowsky, in weaving the story.