1.   But the report perpetuates the myth that the department can police itself.

2.   Chief Patrick E. Kelleher, head of the Internal Affairs Bureau, has pledged that the investigation will prove that the department can police itself.

3.   City Hall sees the arrests as evidence that the department can police itself.

4.   One of the most difficult issues for the task force was whether the police department can really police itself.

5.   This calculation assumes that the department polices agriculture as thoroughly as other areas of the economy.