The second dancer in the Duke rape case has said for the first time that the accuser told her to "go ahead, put marks on me" after the alleged attack.
Dancer Kim Roberts made the new allegation -- which she has not shared with authorities -- in an interview with Chris Cuomo that aired today on "Good Morning America."
Watch Part Two of Chris Cuomo's Exclusive Report Tuesday on "Good Morning America."
Roberts' allegation comes after Durham District Attorney Mike Nifong's admission in court last week that he has not yet interviewed the accuser "about the facts of that night."
As she drove the accuser from the March 2006 Duke lacrosse party, Roberts told ABC News the woman was clearly impaired and "talking crazy."
Roberts said she tried several different times to get the accuser out of her car.
"The trip in that car from the house … went from happy to crazy," Roberts told Cuomo. "I tried all different ways to get through to her."
"I tried to be funny and nice," she said. "Then I tried to, you know, be stern with her. … We're kind of circling around, and as we're doing that, my last-ditch attempt to get her out of the car, I start to kind of, you know, push and prod her, you know."
Roberts said she told the woman, "Get out of my car. Get out of my car."
"I … push on her leg. I kind of push on her arm," Roberts said. "And clear as a bell, it's the only thing I heard clear as a bell out of her was, she said -- she pretty much had her head down, but she said plain as day -- 'Go ahead, put marks on me. That's what I want. Go ahead.'"
Roberts said the comments "chilled me to the bone, and I decided right then and there to go to the authorities."
Roberts was not aware at the time of any rape allegations, which were first made by the accuser after police had arrived and taken the woman to a crisis center.
In the interview, Roberts appeared reluctant to talk about her new allegation.
"It is something that has been weighing on my heart, and I worry that maybe I won't be called to trial," Roberts told Cuomo, as she reached for a tissue.
"Because all of, so many of her, so much of [the accuser's] statement differs from mine, and I, I might not help the prosecution at all as a witness."
Roberts became visibly upset as she described the accuser's comments for the first time, at one point stopping the interview.
"I don't even want to talk about it anymore," she said.
"Why is it so hard for you to reveal that?" Cuomo asked Roberts.
"Because I think it's gonna make people rush to judgment," she said. "It's gonna make them stop listening. … And I don't like this at all. It's gonna make, It's gonna make people not listen, and I, I'm sure you're probably not even going to play this. It's gonna make people not listen to any other part of the story. It's gonna make people so judgmental. It's gonna solidify their opinions so much, that they're not gonna want to hear the other aspects of the case, which I think are just as important."
Roberts' attorney, Mark Simeon, said she never shared what she says were the accuser's final comments with police, not realizing their significance at the time.
He said she would be willing to take a lie detector test about the new information.