Brazil’s far-right government, under the helm of Jair Bolsonaro, has taken a major step to criminalize journalism and silence one of its most effective critics. Yesterday, a federal prosecutor announced that he is seeking criminal charges against Brazil-based journalist Glenn Greenwald for “cyber crimes.”

The charges stem from the Intercept Brazil’s groundbreaking reporting on leaked chat messages giving a firsthand look into the country’s anti-corruption task force. The articles not only exposed a high-profile anti-corruption investigation as politically biased, they helped set the stage for the release of former Brazilian president Lula da Silva from prison.

Authorities insist that Greenwald illegally helped the hackers. But make no mistake: this is a massive assault on press freedom.