Justice Musithu said the police were “on a fishing expedition” when they arrested Chin’ono and that the charges against him were unclear.
“It means my arrest and my case were trumped up as I have always argued,” Mr Chin’ono tweeted after his acquittal.
Mr Chin’ono, a fierce government critic, has been arrested at least three times in the last three years for sharing information that is deemed critical of the government.