Transcript for Facebook Fraud Suspect Now on the Run
But now to the man facing trial for allegedly trying to defraud Facebook falsely claiming he owned half the company. He's on the run right now vanishing just weeks before his trial was set to begin. ABC's linsey Davis has that story for us. Reporter: This morning a massive manhunt for an alleged Facebook fraudster. Paul ceglia is supposed to face trial in may on charges he tried to scam mark Zuckerberg out of millions using fake documents but authorities say he's gone without a trace. Leaving even his lawyer baffled. Where might he be? I don't know. I have no clue. Reporter: On Sunday, a frustrating clue. U.s. Marshals finding his electronic monitoring bracelet at his home but no ceglia. Then when the 41-year-old husband and father failed to show up for a court appearance on Tuesday, the judge revoked his bail and questioned whether ceglia had been planning an escape for months. I never had a sense that he might flee. This is out of character as I know Paul to be. Reporter: Ceglia's legal battle with Facebook reads like a scene out of "The social network". Do you realize you jeopardized the entire company and -- Reporter: In 2010 he sued Zuckerberg claiming the Facebook co-frowneder promised hill half of the company seven years earlier while "The social network" was in development. He was once employed as a computer programmer and cited a contract they said they signed to seal the deal. The problem, a federal judge would rule the contract and other evidence he presented were all a fabrication resulting in current mail and wire fraud charges. Zuckerberg was expected to testify at the upcoming trial and ceglia who has pleaded not guilty could face up to 40 years in prison if convicted. Of course, they have to find him first. For "Good morning America," linsey Davis, ABC news, new York. Now, back in 2011 ceglia moved to Ireland for several months but was then ordered back to the United States to turn over evidence in his case. He later had to surrender both U.S. And Irish passports and still has a wife and kids here. A real mystery where he might be. Strange story. Thank you. To Amy now in the social
This transcript has been automatically generated and may not be 100% accurate.