Three white police let their K9 dog to bite and twist the arm of a black suspect while he's pinned to the ground

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This is the unbelievable moment three police officers allowed a K9 dog to maul a man's arm while they held him, face down, on the side of the street.

The suspect arrested in San Diego, California, was left with a large open wound after the dog pounced on him and brutally bit him - as officers didn't utter a single command word to stop the attack.

Angel Nunez, captured the incident on his way to work, and posted the video to Facebook.

'This K-9 officer had no control of his K-9,' he captioned it.

'There is something definitely wrong with this picture. The officer doesn't seem to have the proper training. Also that dog is not well trained.'

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