Quincy Jones to Testify in Joe Francis, Steve Wynn Trial

We're going to get right to the latest in the courtroom showdown between two megamoguls with cameras rolling. Caught in the middle, music legend quincy jones, in the trial pitting steve wynn against... See More

We're going to get right to the latest in the courtroom showdown between two megamoguls with cameras rolling. Caught in the middle, music legend quincy jones, in the trial pitting steve wynn against the creator of "girls gone wild," joe francis. Abc's john schriffen has the details. Reporter: Legendary music producer, quinnty jones, is known for being behind some of pop music's biggest hits. But later this morning, he's expected to be front and center in an l.A. Courtroom. Quincy jones will drive up tomorrow morning with steve wynn anme into the courtroom and tell the truth. Reporter: The 79-year-old is said to be the star witness in what's quickly becoming hollywood's most buzzed-about trial. On one side, steve wynn, the las vegas hotel and casino magnate. On the other, "girls gone wild" founder joe francis. Francis says wynn threatened to kill him two years ago in an e-mail. He was going to hit me in the back of the head with a shovel and bury me in the desert. Reporter: Wynn not only says that's false. He's suing for defamation. Caught in the middle, is jones. Friends with wynn, and slated to be the best man at francis' wedding. He says to me, if he doesn't settle with me, I'm not going to be the best man at his wedding. He refers to joe francis as a screwball, a maniac, worse than a villain. Reporter: Jones had been given a waiver not to testify on the stand because he is ill. I asked him, if he would come, his testimony would be important. Reporter: Francis' attorney, went after wynn. Showing an interview in the '80s, AND WITH CBS NEWS. If I don't see this version in this edited tape, I will check both of you. Reporter: The attorney says that tape showed wynn's temper. I have a temper and I lost it on occasions. Reporter: The case will come down not to wynn's temper, but to his typing. And what he did or didn't write in an e-mail. For "good morning america," john schriffen, abc news, new york.