noun, noun or participle which takes 'suru', transitive verb, noun which may take the genitive case particle 'no'
criminal investigation; inquiry; search
Most often refers to an official investigation by police or prosecutors into a crime or incident. Used as a noun, as 捜査する for 'to investigate', and before nouns as in 捜査機関 or 捜査資料.
警察が事件を捜査している。
The police are investigating the case.
捜査の結果、容疑者が逮捕された。
As a result of the investigation, a suspect was arrested.
新しい証拠が捜査を大きく進展させた。
The new evidence greatly advanced the investigation.