testimony in the courtroom faceoff between two vegas titans. Casino mogul, steve wynn, and "girls gone wild" creator, joel francis. Both took the stand. And john schriffen has the story. Reporter: The... See More
testimony in the courtroom faceoff between two vegas titans. Casino mogul, steve wynn, and "girls gone wild" creator, joel francis. Both took the stand. And john schriffen has the story. Reporter: The kings of two vegas vices, gambling and girls, found themselves in a las vegas courtroom on tuesday, facing off over allegations of death threats, defamation and unpaid debt. Joe francis decided he was going to destroy the company. Reporter: Steve wynn, the las vegas hotel mogul, is suing francis, the los angeles-based founder of "girls gone wild." Francis says wynn threatened to kill him, in a video seen by music producer, quincy jones and others. Wynn not only denies the allegation. He's accusing the 39-year-old of ruining his reputation. It's a grudge match befitting of sincele town. Before cameras started rolling, francis told jurors, he was convinced the billionaire magnate was out to get him. Calling quincy jones saying, quote, I'm nervous. I just got an e-mail from this crazy expletive. Francis says when he replied who? He said, your buddy, steve wynn. Francis described that e-mail in an exclusive interview with "gma" friday. He was going to hit me in the back of the head with a shovel and bury me in the desert. Reporter: But in court, francis admitted, he never actually saw that message. Saying, he only got a glimpse of the wording when jones flashed a stack of e-mails in front of him. And he said on the stand, he never threatened to kill francis. Though, he's not a fan of his. Quincy jones will, in fact, testify as early as tomorrow. That testimony could very well decide who wins.
This transcript has been automatically generated and may not be 100% accurate.