Federal authorities have initiated a probe into the financial dealings of Mark Walter, the owner of the Los Angeles Dodgers, focusing on approximately $16 billion in private-credit transactions. The investigation is examining the operations of Walter's insurance companies to determine if any fraudulent activities have occurred.

The inquiry was reportedly sparked by a whistleblower, according to sources familiar with the matter. The U.S. Attorney's Office for the Southern District of New York and the Securities and Exchange Commission are involved in the investigation.

Walter, who also holds significant stakes in other sports franchises and businesses, has built a substantial financial empire. The focus on his insurance companies and their private-credit deals raises questions about the management and transparency of these complex financial instruments. The substantial sum under review underscores the scale of the potential financial activities being scrutinized.