A few days after Tunisia’s president froze parliament and took on sweeping powers in July, a dozen men in unmarked vehicles and civilian clothes barged into politician Yassine Ayari’s family home overnight and took him away in his pajamas.

“These men weren’t wearing uniforms and they didn’t have a warrant,” Ayari told The Associated Press. “It was violent. My 4-year-old son still has nightmares about it.”

A 40-year-old computer engineer-turned-corruption fighter, Ayari will stand trial again in a military court on Monday, accused of insulting the presidency and defaming the army. It is the latest in a series of trials that shine a light on Tunisia’s use of military courts to push through convictions against civilians. Rights groups say the practice has accelerated since President Kais Saied’s seizure of power in July, and warn that its use further threatens hard-won freedoms amid Tunisia’s democratic backsliding.

The charges Ayari faces relate to Facebook posts in which he criticized Saied, calling him a “pharaoh” and his measures a “military coup.” Ayari intends to remain silent in court to protest the whole judicial process, according to his lawyer, Malek Ben Amor.

Amnesty International is warning of an “alarming increase” in Tunisian military courts targeting civilians: In the past three months, it says, 10 civilians have been investigated or prosecuted by military tribunals, while four civilians are facing trial for criticizing the president.

That’s especially worrying because Tunisia was long considered the only democratic success story to emerge from the Arab Spring uprisings a decade ago, and was long seen as a model for the region.