ProPublica has revealed Donald Trump’s businesses and campaign committees have given significant financial benefits to at least nine witnesses in the various criminal cases against the former president, in what legal experts say could amount to witness tampering. ProPublica reports one campaign aide had his salary doubled; another received a $2 million severance package barring him from voluntarily cooperating with law enforcement.

This comes as Donald Trump has asked the U.S. Supreme Court to annul his guilty verdict in New York.