A police officer in Chicago was charged with first-degree murder on Wednesday for shooting and killing a man while he was off-duty, Chicago Tribune reports. Fifty-seven-year-old Lowell Houser was accused of shooting and killing 38-year-old Jose Nieves, who was moving into a new home on Chicago's Northwest Side. Nieves was unarmed. Houser, a mass transit unit officer, allegedly got into an argument with Jose, and when the situation got tense, fired multiple shots at the man. The incident took place in the 2500 block of North Lowell Avenue in Hermosa at approximately 9:15 a.m. on January 2.This certainly hasn't been the best of weeks for the Chicago Police Department. The murder charge comes only days after a federal report was released showing that the Chicago PD had a long history of using excessive force, covering-ups its mishaps, and a lack of proper training for its officers. The report showed that most of the victims of these crimes were Hispanic or Black.