noun
police investigation
Refers to an investigation conducted by the police, often used in news or legal contexts.
警察捜査が進むにつれて、新たな証拠が見つかった。
As the police investigation progressed, new evidence was found.
この事件の警察捜査は長期化している。
The police investigation into this case has been prolonged.
Compound of 警察 (police) and 捜査 (investigation).