A Calgary police officer who had a patrol rifle stolen from his car last year "will not be charged criminally in connection with the case," police said.

The rifle was taken on April 4 when someone broke into the off-duty constable's personal car as he was eating dinner at a Crowfoot Crossing restaurant. 

The thief took a locked case from the car, which contained the officer's C-8 Colt patrol rifle and two 28-round magazines. 

Police later recovered the stolen weapon and the officer was suspended with pay while an investigation was conducted.

"Following a thorough investigation by the Calgary Police Service Professional Standards Section, that included a review of all the evidence by the Alberta Serious Incident Response Team (ASIRT), the Edmonton Crown Prosecutor's Office has recommended no charges be laid against the officer in question," CPS said in a release on Monday.

"Now that the criminal investigation is complete, a thorough internal investigation will continue under the Police Act, which will look at the officer's judgment, service policies and other factors related to this event."

Crowfoot stolen rifle

Investigators released this image from CCTV footage taken between 10:45 p.m. and 11 p.m. on April 4. (Calgary Police Service)