A more than 20-year-old mystery has been solved.
Attorney Robert Shapiro gave a rare on-camera interview to Megyn Kelly for her special, Megyn Kelly Presents, which aired Tuesday night on the Fox News Channel. Shapiro finally revealed what O.J. Simpson whispered in his ear, after the former football star learned he was acquitted of double murder.
"You had told me this would be the result from the beginning. You were right," Shapiro said Simpson told him during the memorable moment, which was caught on camera.
During the sit-down, Shapiro also talked about another infamous moment from the 1994 trial, when Simpson was asked try on a glove that didn't fit. The 73-year-old lawyer admitted he knew the glove would be too small because he himself tried it on beforehand.
"It was a little bit wide in my palm and a little bit long in my fingers," Shapiro explained. "O.J. Simpson has enormous hands, and I knew that the glove would not fit him. No question about it. Wouldn't even be close."
Simpson was eventually found not guilty of the murders of his ex-wife Nicole Brown and Ronald Goldman. Shapiro, a key member of Simpson's "dream team" defense, has no regrets about the verdict.
"There's two types of justice that we deal with in America: There's moral justice and there's legal justice," Shapiro commented. "If you look at it from a moral point of view, a lot of people would say he absolutely did it. I deal in legal justice, as you do as a lawyer, and that's proof beyond a reasonable doubt. And there's no question in my mind that any fair juror who saw that case from the beginning to the end would conclude there was reasonable doubt."
There's been a resurgence of interest in the O.J. Simpson trial thanks to FX's critically acclaimed miniseries, The People v. O.J. Simpson: American Crime Story, in which Shapiro was played by actor John Travolta. Prior to Kelly's interview, Shapiro has not done a sit-down about the controversial Simpson trial in 20 years.
ET exclusively caught up with prosecutor Christopher Darden in March, when he admitted he hadn't seen a single minute of the popular TV show.
"I can do without it," Darden, 60, said bluntly. "Maybe in three years I can go back and read Twitter and not be offended. You know? Or angry. But you spend 20 years trying to get past something like that. You spend 20 years trying to move on with your life, and then it all catches up with you."
For her part, prosecutor Marcia Clark, 62, praised the show for what it did right -- remembering the victims, Nicole and Ron.
"I think the series actually makes an effort to acknowledge them and the ways in which that they were forgotten," Clark told ET exclusively in February. "This is an important series that's beautifully done, very compelling and I can't thank Ryan Murphy enough for what he's done here in terms of raising these issues in a very serious and compelling and very substantive way."
"But at the end of the day, two people lost their lives in a brutal murder," she added. "So we have to remember that. We can't forget them again. Remember Ron and Nicole."