Elon Musk is expected to take the stand in a shareholder trial on Wednesday in San Francisco, where he’s accused of making false and misleading statements that drove down Twitter’s stock price before he bought the social media platform for $44 billion in 2022.

The lawsuit was filed in October 2022 in the U.S. District Court for the Northern District of California on behalf of Twitter shareholders who sold the stock between May 13 and Oct. 4, 2022, a few weeks before Musk’s purchase of Twitter was finalized. It claims Musk violated federal securities laws by making false, public statements that “were carefully calculated to drive down the price of Twitter stock.”