In·spect·or n.
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.
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.
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inspector general
n : a military officer responsible for investigations