(VOVworld) - Chad's former dictator Hissene Habre was tried on Monday in Dakar, Senegal, by a special court established by the African Union on charges of crimes against humanity. Once dubbed "Africa's Pinochet", the 72-year-old dictator has been in custody in Senegal since his arrest in June 2013. Rights groups say 40,000 people were killed during his eight years in power under a regime marked by fierce repression of his opponents and the targeting of rival ethnic groups.