In her first interview since being fired, former CBS News producer Mary Mapes maintains that her controversial "60 Minutes II" story on President Bush's National Guard service was "true" and that "no one has proved that the documents were not authentic."

Mapes was fired after an independent panel found her basic reporting was "faulty."

In her interview with ABC News chief investigative correspondent Brian Ross, to be broadcast Wednesday morning on "Good Morning America," Mapes says she is unrepentant about her role. "I don't think I committed bad journalism. I really don't," she says.

Mapes says she is continuing to investigate the source of the controversial documents whose authenticity was seriously questioned by the CBS panel.

She tells Ross that she had no journalistic obligation to prove the authenticity of the documents before including them in the "60 Minutes II" report. "I don't think that's the standard," she said.

Mapes tells Ross she feels in no way responsible for what happened at CBS News in the wake of her "60 Minutes II" report.

"If you're talking about an investigation that basically gutted a news organization, and turned people one against another and made people afraid of each other, and really scooted the country's most experienced anchor out of his anchor chair, and now has the evening news casting about for some kind of format that will be zippy and new, I didn't do that. I had absolutely nothing to do with any of that," she said.

"Her disregard for journalistic standards — and for her colleagues — comes through loud and clear in her interviews and in the book that attempts to rewrite the history of this complex and sad affair," the statement said. It also pinpointed Mapes' notion that a news organization has no obligation "to authenticate such important source material" as only one of the "troubling and erroneous statements in her account."