An $8 billion US trial by Meta Platforms shareholders against Mark Zuckerberg and other current and former company leaders kicks off on Wednesday over claims that they illegally harvested the data of Facebook users in violation of a 2012 agreement with the U.

The first trial of oversight liability claims against a public company may prove riskier for Delaware’s elite business court and its chief judge than the expected star witness, Meta Platforms Inc. founder Mark Zuckerberg.

On Wednesday, a trial began in Delaware, where Meta Platforms shareholders are seeking $8 billion in damages from top executives, including Mark Zuckerberg, Peter Thiel and Sheryl Sandberg, over alleged failures to protect user data following the Cambridge Analytica scandal.

Meta has reached a confidential settlement with shareholders just before a major trial over Zuckerberg’s power and board oversight was set to begin, ending a legal fight over Facebook governance.