A Chicago Police officer speaks sternly to a man and woman dressed in costume at the scene of a shooting in the 7500 block of South Morgan Street Saturday, Oct. 29, 2016, in the Gresham neighborhood of Chicago. Halloween weekend, which saw unusually warm weather, was the deadliest weekend in all of 2016. Although police resources were increased to provide crowd control around Wrigley Field for the Chicago Cubs’ home World Series games, Chicago Police Superintendent Eddie Johnson said the department was not short-handed in the South and West Side neighborhoods where most of the violence took place. The department cancelled days off and required mandatory 12-hour shifts for all officers. An officer on duty at a double homicide in the Back of the Yards neighborhood over the weekend, who wished to remain anonymous, complained about the long hours and last-minute notification. He gestured to a vehicle covered in a sheet behind him where two people lay dead: “Obviously it doesn’t always help.” 42 people were wounded and 17 people were killed between Friday and Monday over Halloween, pushing the number of homicides for the year past 600.