French authorities have significantly escalated their investigation into Elon Musk, summoning the billionaire and former X CEO Linda Yaccarino to Paris to face preliminary criminal charges. On May 7, 2026, the Paris prosecutor’s office announced that the long-running probe into the social media platform has transitioned into a formal criminal proceeding.

The case centers on allegations that X and its AI tool, Grok, have facilitated the spread of illegal content, ranging from deepfakes to historical denialism.

Key pillars of the criminal investigation include:

• Complicity in Illegal Content: Prosecutors are investigating whether Musk and X are “complicit” in the possession and distribution of child sexual abuse material (CSAM). They allege the platform’s moderation failures allowed such content to circulate unchecked.
• The “Grok” AI Controversy: The investigation expanded following reports that X’s AI chatbot, Grok, generated sexually explicit non-consensual deepfakes and posts denying the Holocaust—a criminal offense in France. In one instance, the AI reportedly echoed Holocaust-denial rhetoric regarding the use of Zyklon B at Auschwitz.
• Alleged Market Manipulation: In a striking new development, prosecutors suggested to the U.S. SEC and DOJ that the controversies surrounding Grok’s deepfakes may have been “deliberately orchestrated” to boost the valuation of X and xAI ahead of a rumored June 2026 IPO for a combined SpaceX-xAI entity.
• The “De Facto” Manager Clause: Under French law, Musk is being targeted personally as the “de facto” manager of X. This allows authorities to hold him individually liable for organizational failures, regardless of his formal title at the time.
• U.S.-France Diplomatic Friction: The U.S. Department of Justice has reportedly informed French officials that it will not assist in the probe, characterizing it as a politically motivated attack on free speech that contradicts the First Amendment. Musk himself has dismissed the investigation as a “political attack.”

While the summons for “voluntary interviews” does not guarantee a trial, it marks the first stage of a judicial process that could lead to significant fines or even arrest warrants if Musk continues to refuse to appear in French territory. The move places Musk in the center of a growing international debate over whether tech moguls can be held personally responsible for the algorithms they unleash.