France has formally opened a full criminal investigation into Elon Musk and his social media platform X — and the stakes couldn’t be higher. Legal experts are calling it the largest criminal probe of an American tech CEO ever launched by a European government. The investigation targets two distinct areas: the alleged manipulation of X’s algorithm to interfere in French domestic politics, and the illegal spread of AI-generated content through Musk’s chatbot Grok, including Holocaust-denying material and nonconsensual s*xually explicit deepfakes.
The case has been building for over a year. It began in January 2025, when Éric Bothorel, a member of the French National Assembly representing the centrist Renaissance Party, filed a formal complaint with French cybercrime prosecutors. Bothorel alleged that X had been weaponized — its algorithm deliberately tilted — to shape public opinion and electoral sentiment inside France. The complaint didn’t stay quiet for long. By February 2026, French law enforcement had escalated dramatically: police executed a raid on X’s Paris offices, a move that sent shockwaves through the European tech and political establishment. Raiding the offices of a company owned by one of America’s most powerful billionaires was, by any measure, a stunning escalation.
Then came the summons. French prosecutors formally requested that both Elon Musk and former X CEO Linda Yaccarino appear for voluntary questioning on April 20, 2026. The message was clear: French authorities wanted answers, and they wanted them directly from the people at the top. Neither Musk nor Yaccarino showed up. The decision not to appear — whether strategic, defiant, or legally advised — proved costly. Within weeks, prosecutors responded to the no-show by doing exactly what they had the power to do: they elevated the case to a full criminal investigation.
That designation is not symbolic. Under French law, a full criminal investigation — known as a mise en examen — grants prosecutors sweeping authority. They can now subpoena records, compel testimony, seize documents, and pursue formal criminal charges against named individuals. Both Musk and X are now formally within the scope of that authority. It is no longer a civil inquiry or a regulatory review. This is a criminal case, and Musk is personally named as a focus of it.
X has pushed back hard. In a statement, the company called the investigation “politically motivated” — a charge that follows the company’s familiar playbook when facing government scrutiny in Europe. The European Union has already been at odds with Musk’s X over content moderation practices under the Digital Services Act, and tensions between the platform and regulators on the continent have been simmering for over a year. X maintains it has done nothing wrong. No formal criminal charges have been filed against Musk personally — at least not yet. But the legal machinery is now fully in motion.
What makes this story land differently is the context surrounding it. In June 2025, Musk posted on his own platform: “Without me, Trump would have lost the election.” He said it himself — openly, publicly, without apology. The man who claimed personal credit for shaping the outcome of a U.S. presidential election is now the subject of a criminal investigation in one of America’s closest European allies, accused of doing something strikingly similar on the other side of the Atlantic. Whether that connection is coincidental or part of a broader pattern is exactly what French prosecutors say they intend to find out.
The investigation puts the United States in an uncomfortable diplomatic position. Musk is not just a private citizen — he has been a prominent figure in the Trump administration’s orbit, having led the Department of Government Efficiency. A sitting American billionaire with deep ties to the White House now faces a criminal probe from an allied government that believes his platform was used to subvert their democracy. There are no easy answers here, and the story is far from over. The next move belongs to French prosecutors — and to whether Musk and X decide to cooperate or continue to fight it from a distance.