DUI Saturation Patrol – 6th (Gresham) District 10 Aug 2017 The Chicago Police Department will be conducting a DUI Saturation Patrol in the 6th (Gresham) District this weekend. The DUI Saturation Patrol will commence at 7 p.m. on Friday, August 11, 2017 and end at 3 a.m. on Saturday, August 12, 2017. For more information, click here.