In 2013, 94 Emirati activists were held in secret detention centres and put on trial for allegedly attempting to overthrow the government. Human rights organizations have spoken out against the secrecy of the trial. An Emirati, whose father is among the defendants, was arrested for tweeting about the trial. In April 2013, he was sentenced to 10 months in jail. The latest forced disappearance involves three sisters from Abu Dhabi.