But she thinks it's "fabulous" Cosby is once again under fire for allegedly drugging and sexually assaulting 14 women – including former Temple University employee Andrea Constand.
"He is in fact a sexual predator," Green, 66, tells PEOPLE exclusively. "I don't dispute the fact the man has done much good, but he is a flawed man."
"He's not the fictional Dr. Huxtable or the Jell-O salesman," she says. "This is Bill Cosby who for years felt entitled because of his status as a celebrity and because for years he was above the law. And he'll always be a small man because a great man would embrace his faults as well as his talents."
Cosby's spokesman, David Brokaw, could not be reached. In the past Brokaw has said her claims are not true.
Constand went to authorities in Montgomery County, Pennsylvania, where Cosby, 77, owns a home and where she said the sexual assault happened, in January 2005.
Five weeks later, then-Montgomery County District Attorney Bruce L. Castor Jr., citing "insufficient credible and admissible evidence," announced there would be no criminal charges against Cosby.
Constand subsequently filed a civil suit against him, and 13 other women with similar stories were added as supporting witnesses. She settled the lawsuit for an undisclosed amount in November 2006.
"The district attorney in Montgomery County wouldn't file the charges because he said it was a he said/she said case," says Green, who is retired and lives in southern California, "but 10 years later because of social media people get to decide these facts for themselves."
Coming ForwardGreen, who once represented Liza Minnelli's stepmother in a lawsuit against the famous singer, was the first of the 13 women to go public with her story.
She contacted Constand's attorneys after hearing Castor characterize Constand's allegations against Cosby as "weak" at a press conference in January 2005.
"I worked in a DA's office and that's DA-speak for, 'We're not filing charges,' " Green told the Philadelphia Daily News in her first interview. "I felt compelled to come forward after I heard that."
Through the years, Cosby has only given one interview on Constand's accusations – to The National Enquirer, which ran in March 2005.
"Looking back on it, I realize that words and actions can be misinterpreted by another person," Cosby told the tabloid, "and unless you're a supreme being, you can't predict what another individual will do.
"I'm not saying that what I did was wrong, but I apologize to my loving wife, who has stood by my side for all these years, for any pain I have caused her," he told the Enquirer. "These allegations have caused my family great emotional stress."
He addressed Green's claims in that interview as well.
"My problem is with some media and how it appeared that Miss Green was allowed to be a 'wrecking ball,' " he told the Enquirer.
Green not only told her story to Constand's attorneys, Dolores Troiani and Bebe Kivitiz, who were partners in Devon, Pennsylvania, but she went to Montgomery County authorities as well.
"I volunteered to take the heat and believe me there was considerable heat," she says.
Controversy Heats UpCosby's people began leaking negative information about her to the press after her interview with the Daily News went national – all of which was true, she says.
"I expected that," she says. "I've been a career defense attorney. I know how to crack credibility.
"Believe me I'm not a perfect person either," she says. "On the other hand, I have perfect credit and have never been arrested for a felony."
She believes the accusations might go away for good if Cosby would just admit to what he did – and apologize.
"I keep thinking of two words – he needs to own it," she says. "He needs to say, 'I am a flawed character. I let stardom go to my head. I'm an older and wiser man and I want to apologize to the people that I have hurt.' How hard can that be?"
If he would just do that, "every celebrity would say, 'Everyone makes mistakes,' " she adds. "So keep it up. We'll be here."