inspector

/ɪnˈspɛktər/
noun
  1. A person whose job is to officially examine or check something to make sure it meets standards or rules.
    • The building inspector checked the new house for safety issues.
    • The school inspector observed several classes during the visit.
    • A health inspector visited the restaurant to examine the kitchen.
  2. A police officer of a rank above sergeant, often in charge of investigations.
    • Inspector Patel arrived at the crime scene to lead the investigation.
    • The detective was promoted to inspector after solving the case.
    • Inspector Jones questioned the witnesses about what they saw.