捜 - search, look for, locate

search (esp. in criminal investigations); investigation; inquiry; enquiry

search (esp. for someone or something missing); manhunt

(police) investigator

special investigation

undercover investigator

searcher; seeker

investigating authorities; law enforcement authority

(criminal) investigation headquarters

sting operation; undercover investigation

search warrant

house search (e.g. by the police)

initial investigation (by police)