police investigator; investigating officer
Refers to a law enforcement officer who conducts criminal investigations. Often used in news reports and crime dramas.
捜査官が現場に到着した。
The investigators arrived at the scene.
彼はFBIの捜査官だ。
He is an FBI investigator.
After years of effort, he became an investigator.
The investigator is investigating the murder case.
The criminal posed as an investigator and visited the victim's house.
She attended the scene in her capacity as an investigator.