当年的警察规则在此

The officer was later criticized by some, including the president of 100 Blacks in Law Enforcement Who Care, for having his gun drawn while patrolling even though no specific danger had been reported. But there are no police guidelines telling officers when to draw their guns; it is a decision that rests largely on the officer's own assessment of danger, and housing project rooftops are often havens for drug dealers and other criminals. After the shooting, Commissioner Kelly convened a panel to review procedures and training issues, but he has said unequivocally that the decision to draw a gun must be the officer's call.