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Investigator (Noun)

A police officer who investigates crimes.

Nouns denoting people.

The lead investigator on the case was a seasoned detective with years of experience.
After gathering evidence, the investigator interviewed the suspects and their alibis were scrutinized.
As a homicide investigator, she had seen her fair share of gruesome crime scenes.
The investigator pieced together the fragments of evidence to reconstruct the events of the night of the murder.
The chief of police assigned a new investigator to review the cold case files and see if any new leads could be found.

Someone who investigates.

Nouns denoting people.

The detective was a skilled investigator who had solved many high-profile cases throughout her career.
As a private investigator, he was hired by the company to look into the allegations of embezzlement.
The government appointed a special investigator to look into the claims of corruption within the agency.
She worked as a medical investigator, studying the causes of rare diseases and developing new treatments.
The insurance company sent an investigator to assess the damage and determine the cause of the fire.

A scientist who devotes himself to doing research.

Nouns denoting people.

The renowned investigator spent years studying the effects of climate change on polar bears.
As a leading investigator in the field of genetics, Dr. Smith was awarded numerous grants for her research.
The investigator's groundbreaking discovery of a new species of plant was published in a prestigious scientific journal.
After completing her Ph.D., Dr. Lee became a respected investigator in the field of neuroscience, specializing in brain development.
The investigator's tireless efforts to find a cure for the disease led to a major breakthrough in medical research.