🚨NEW: 'Gangster Disciples' Chicago gang member who tortured a White disabled teen for three days in 2017 and live-streamed the attack on FB is now accused of robbing a White cyclist who waved at himTesfaye Cooper, 30, was arrested after allegedly chasing down and robbing a cyclist near a Chicago train stationPolice say the attack began after the victim waved at the two menOfficers say Cooper and Mazi Pearson, 33, shouted they were “GDs,” or Gangster Disciples, before chasing the cyclistThey all