Lawyers for Facebook have added a New York man's arrest on fraud charges to their list of reasons his lawsuit claiming part ownership of the social networking giant should be dismissed.

Facebook says in a recent federal court filing in Buffalo that the U.S. Attorney's decision to charge Paul Ceglia with two felony counts last month objectively backs up what the company and founder Mark Zuckerberg have been saying since Ceglia first sued: that Ceglia fabricated the contract on which his lawsuit is based.

Ceglia, of Wellsville, N.Y., has pleaded not guilty to charges of scheming to defraud Facebook by filing his civil suit. Ceglia has stood by his claims that a 2003 contract he and Zuckerberg signed entitles him to a 50 percent stake in Menlo Park, Calif.-based Facebook.