SEATTLE — A federal judge has ordered officers in one of the Nation’s largest police departments to stop carrying a controversial handgun.

The Chicago Police Department began phasing out the Sig Sauer P320 pistol earlier this year, but US District Judge Rebecca Pallmeyer said the department did “not fully answer” questions about the continued use of the gun by some officers. She ruled that Chicago officers should stop carrying the P320 “immediately.” The order was requested by the union representing officers.

It’s the latest setback for the P320, which is widely used by police officers and he military. Earlier this year, the Washington State Criminal Justice Training Commission (WSCJTC), which trains all police officers in the state, banned the handgun amid concerns that it can fire wit

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