inspector

♦ in|spec|tor /ɪnsp'ektər/ (inspectors)
1 [N-COUNT]
An inspector is a person, usually employed by a government agency, whose job is to find out whether people are obeying official regulations.
The mill was finally shut down by state safety inspectors.
2 [N-COUNT; N-TITLE; N-VOC]
In Britain, an inspector is an officer in the police who is higher in rank than a sergeant and lower in rank than a superintendent.
I got on the phone to Inspector Joplin at Scotland Yard.
3 [N-COUNT; N-TITLE; N-VOC]
In the United States, an inspector is an officer in the police who is next in rank to a superintendent or police chief.
...San Francisco police inspector Tony Camileri.