Remains under house arrest

Detention without trial is unlawful. Most are 100 % Free why is he still under house arrest? 

Hi all, I just wanted to reach out to let you know we’ve just passed 14,174 signatures on our petition! Thank you so much for your support! Will you help me to get more support by sharing this petition with ten other people? If enough of us sign we can’t be ignored! Here’s a link to share https://www.change.org/p/saudi-government-release-sheikh-kh-mohammed-al-amoudi