Inspector (noun)

1. An official appointed to examine and report on something.
2. A police officer of high rank.

Origin:

Late 16th century, from latin inspector, from the verb inspicere to inspect.

Examples:

1. The health inspector checked the restaurant for cleanliness and safety violations.
2. The building inspector approved the plans for the new construction.
3. The inspector was a veteran detective with years of experience.
4. The inspector arrived to investigate the crime scene.
5. The inspector asked the witnesses questions about what they saw.