On the evening of Oct. 27, 2011, Crystal's squad saw a suspected drug dealer, Antoine Green, throw down his package as he ran from them. Green kicked in the door of a house on Prentiss Place to hide, and that house turned out to be the home of a girlfriend of Officer Anthony Williams. Police arrested Green and put him in the van to go to jail. But then Williams, who was off duty, arrived on the scene. He spoke to Sgt. Marinos Gialamas, who called the van back. Then Gialamas stood by while Williams allegedly tuned Green up.