Story highlights Mayor says Chicago police will get 700 more Tasers, doubling number they have

Change comes in wake of controversial fatal shootings

(CNN) Chicago's mayor and police superintendent announced Wednesday that every officer who responds to service calls will have a Taser in the patrol car and officers will be properly trained to use them.

Mayor Rahm Emanuel said the number of Tasers will double to 1,400.

The announcement is part of a major overhaul in Chicago Police Department policy, Emanuel said.

"With the right policies, the right procedures and the right practices, we can change our officers' perspectives to help them ensure their own safety and the safety of others," he told reporters at City Hall.

One of the other changes is that officers who are involved in a shooting will be put on desk duty for 30 days instead of three.

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