A Russian-American businessman based in Miami is suspected of making nearly $23 million from alleged insider trading involving former President Donald Trump’s media company, according to federal court records.

The businessman, Anton Postolnikov, is the owner of a Caribbean bank that caters to the porn industry and also reportedly loaned $8 million to Trump’s media company. Postolnikov, who owns a few residences on exclusive Fisher Island in Miami, is the nephew of a former high-ranking Russian government official who at one time was a staffer for Russian President Vladimir Putin, according to media reports.