An investigation carried out by police to uncover the facts of an incident or crime, including interviews, on-site inspections, and evidence collection.
警察捜査が進み、重要な証拠が見つかった。
The police investigation progressed and important evidence was found.
被害者は警察捜査に協力すると述べた。
The victim said they would cooperate with the police investigation.
マスコミは警察捜査の状況を詳しく報じた。
The media reported the status of the police investigation in detail.