Updated 5:55 p.m. ET, 3/12/14
(CNN) - The attorney for a former top aide to New Jersey Gov. Chris Christie on Wednesday demanded that state officials investigating a political scandal roiling his administration turn over additional emails they have uncovered.
The move comes a day after the attorney representing the state legislative investigative committee, Reid Schar, asked a judge to enforce a subpoena seeking documents from the ex-aide, former Christie campaign manager Bill Stepien, and another former official, Bridget Kelly, who was the governor's deputy chief of staff.
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Schar told Judge Mary Jacobson the committee has a number of additional emails that appear to link Stepien and Kelly more closely to the scandal involving suggestions Christie appointees orchestrated traffic jams near the George Washington Bridge in Fort Lee last September to punish that town's mayor.
Neither has been accused of wrongdoing by investigators.
"It is a foregone conclusion, based on the type of communications that are going on, that, in fact, there are additional emails that are out there. And I'm not guessing judge. I know it because I've seen them," Schar said.
And it's those additional emails, which have not been released publicly, that Stepien's lawyer, Kevin Marino, asked to see on Wednesday.
"We demand production of the alleged 'additional documents' that Mr. Schar claimed, at yesterday's hearing, demonstrate that Mr. Stepien is 'central to' the committee's investigation," Marino wrote in a letter to Schar.
Marino also filed a request with the court that Schar produce the documents in five days.
Both Marino and Kelly's attorney have argued that turning over documents to the committee that are under subpoena would violate their constitutional right to remain silent.
State Assemblyman John Wisniewski and his investigative panel co-chair and fellow Democrat, Senate Majority Leader Loretta Weinberg, said in a statement that they would review Marino's request.
But they would continue to urge Stepian "to do the right thing and comply with the subpoena and provide documents that could shed light on the abuse of government power and threat to public safety."
Documents already released publicly show that Kelly wrote a now infamous email to Port Authority executive David Wildstein saying: "Time for some traffic problems in Fort Lee."
The release of her exchange with Wildstein and the disclosure of other documents in January elevated what had been a simmering Garden State saga into a scandal that has captured national attention and clouded Christie's 2016 presidential prospects.
Stepien's name also surfaced in emails around the scandal. He managed both successful gubernatorial campaigns for Christie, a Republican.