Tesla Logo|Chris Hunkeler|CC BY-NC-SA 2.0

The U.S. Securities and Exchange Commission (SEC) began an investigation to verify whether Tesla Inc. CEO Elon Musk and his brother Kimbal "violated insider trading rules,” said the Wall Street Journal on Thursday. Reportedly, the SEC began scrutinizing the Musk brothers’ dealings after Kimbal sold his shares of Tesla for a whopping $108 million last year.

Although the SEC refused to comment on the matter, Elon Musk has alleged that the SEC is looking to punish him for remaining an outspoken critic of the government.