A heavily criticized months-long federal law enforcement operation in Chicago has caused a decrease in crime and resulted in the removal of criminal illegal immigrants, the Department of Homeland Security said Wednesday. Since the Operation Midway Blitz in September, many crimes have dropped, including a 15% drop in murders, murders, a 41% drop in robberies, and a 48% decrease in carjackings. In addition, transit crime was down 2,000% and shootings dropped by 35%, its lowest levels in four years, DHS said.