The trial continues in Zimbabwe of six socialists threatened with long prison terms for showing a video about the Arab Spring.
The case resumed on Wednesday 28 September when a police spy at the video showing gave evidence.
Detective Sergeant Jonathan Shoko told the court that he had spoken to student leader Welcome Zimuto shortly before the meeting began.
“I could tell from his tone that he was anti-President Mugabe, so we castigated the president together and belittled him,” he said.
The defendants include Munyaradzi Gwisai, coordinator of Zimbabwe’s International Socialist Organisation.
Some 50 people were arrested and charged with treason after a police raid on the meeting in February.
Most of these were released without charge after imprisonment and torture, but the remaining defendants could get 20 years in prison if they are found guilty.
Observers believe that the delays in the trial are down to the state being worried about the weakness of their case. The trial continues on Tuesday 11 October.