All responding Chicago police officers are now trained to use a Taser, Chicago Police Supt. Eddie Johnson announced Tuesday. 

"CPD has implemented and enforced procedures to ensure all officers responding to calls are issued a Taser at the start of their shift," reads a Chicago Police Department news statement. "The expansion of Tasers is part of CPD's goal to create the safest environment possible for police officers and the citizens they serve."

Chicago Mayor Rahm Emanuel moved to increase the number of tasers in the CPD arsenal after the fatal shootings of Quintonio LeGrier and Bettie Jones. The two were shot and killed by police who responded to a call for assistance at a West Side apartment building on December 26. 

Also on Tuesday, Johnson announced that the police department has started to expand the use of body cameras. The expansion, when completed, will cover six additional police districts. Officers in Chicago's 14th District (Shakespeare District) are now wearing the cameras on patrol. And in the next couple weeks, officers in the 15th District in Austin will begin wearing the devices, according to the department. 

"Tasers and body cameras are extremely valuable tools not just to fight crime, but also in our ongoing effort to restore public trust and accountability," Johnson said in a statement.