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MIAMI (AP) -- Two Miami police officers will not face charges after fatally shooting a man who wielded a box cutter during a 2009 traffic stop.

But the Miami-Dade State Attorney's office stopped short of saying the officers were justified in using deadly force. The Miami Herald reports the details of the incident remain unclear because the officers refused to give statements to investigators.

On Nov. 14, 2009, Miami officers Omar Ayala and George Diaz pulled over Corey McNeal. Prosecutors believe the officers were patting McNeal down when he began to resist violently, forcing Ayala to the ground. The officers then shot the man 27 times.

But prosecutors say key details are missing because the officers did not cooperate in the investigation.

Prosecutor David I. Gilbert wrote in a memo, "We cannot justify unknown acts."