Слово "investigator". Англо-русский словарь Мюллера

The only thing to mislead the investigator would have been belief in all the good things he said of himself.

She had heard of M. Hercule Poirot, the well-known investigator, but this was the first time she had seen him in the flesh. The comic, almost ridiculous, aspect that he presented disturbed her conception of him.

It's written that he came to the investigators at half past eleven in the morning, and he talked on the telephone in Moscow ... excuse me ... (the face of Rimsky's watch emerged before his eyes). Rimsky tried to remember where the hands had been ...