In his takeover adventure with Twitter, it seems more likely than not that Elon Musk has broken the law.
In some respects, his lawbreaking is easily documented. According to Musk's own disclosure, his purchases of Twitter shares brought him to 5% ownership of the company stock on March 14.
Securities law requires that any such holding be divulged publicly and to the Securities and Exchange Commission within 10 days, or in this case by March 24; Musk didn't make the disclosure until April 4, which was 11 days late.