Hours after he was released from U.S. custody after being charged with trying to extort up to $25 million from Nike, celebrity attorney Michael Avenatti went after the shoe company.

The AP reports that the former attorney for porn actress Stormy Daniels accused Nike of “rampant” corruption.

“In a string of posts on Twitter — a medium he often used to accuse others of wrongdoing — Avenatti claimed Nike has funneled ‘large sums’ of money to elite student-athletes bound for top colleges,” the AP reports. “He added that corruption ‘reaches the highest levels of Nike’ and cryptically referred to receipts that are ‘clear as day.’”

The report adds that Avenatti did not produce evidence or detail just what he thinks the company has done wrong.

“Avenatti’s tweetstorm came the morning after he was arrested and charged in two separate federal cases,” the report notes. “In Los Angeles, he’s accused of embezzling money from a client. In New York, prosecutors say he told Nike he would reveal damaging information about its dealings with a youth basketball team unless the company paid him millions.”

Avenatti has denied the allegations.