iStock/Thinkstock(DALLAS) — Facebook CEO Mark Zuckerberg is scheduled to testify in a multi-billion dollar lawsuit against his company Tuesday.

The case relates to Facebook’s 2014 purchase of Oculus, the virtual reality headset maker. Zenimax — a suburban Dallas company — claims that Oculus was created using stolen technology and that Facebook knew that when it made the buy.

Zenimax is seeking $2 billion in damages, the amount Facebook paid in the deal to buy Oculus, Business Insider reports.

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