Facebook's Mark Zuckerberg testifies in Oculus Rift lawsuit

Speaking for the company, which is accused of stealing code from Id Software, Zuckerberg said: 'It's common that people claim they own some part of the deal'

Facebook's chief executive, Mark Zuckerberg, appeared in court to testify on behalf of the social media giant's virtual reality company Oculus Rift on Tuesday, as it was accused of stealing trade secrets from Id Software, maker of the Doom and Quake games.

"I'm here because I believe they're false," Zuckerberg said of the charges, "and it's important to testify to that." He characterized the plaintiffs as opportunists: "It's pretty common when you announce a big deal that people just come out of the woodwork and claim they own some part of the deal."