Inspector

1. One who inspects, views, or oversees; one to whom the supervision of any work is committed; one who makes an official view or examination, as a military or civil officer; a superintendent; a supervisor; an overseer.
2. A police officer, typically holding a rank one below superintendent, and in some cases in charge of several precincts; as, inspector Clousseau is investigating the case.
Inspector general (Mil.),
a staff officer of an army, whose duties are those of inspection, and embrace everything relative to organization, recruiting, discharge, administration, accountability for money and property, instruction, police, and discipline.