to search for;  to look for;  to hunt for;  to search (a house, pocket, etc.);  to search through;  to rummage in (e.g. a drawer)
 search (esp. in criminal investigations);  investigation;  inquiry;  enquiry
 search (esp. for someone or something missing);  manhunt;  legally authorized search of a person, building, etc.
 to track down;  to locate;  to find out;  to smoke out;  to ferret out;  to chase up
 police investigator;  investigator
 investigator (usu. of criminal cases)
 (criminal) investigation headquarters
 to search about for;  to hunt around for;  to look high and low for;  to look everywhere for
 searching for someone;  search for a missing person
 looking for something;  searching for something;  object being sought
 searching for the culprit;  trying to find out who did something
 request for a police search;  application to the police to search for a missing person
 to search for;  to seek for;  to look for
 house search (e.g. by the police)
 house hunting;  searching an entire house;  searching a house thoroughly
 compulsory investigation;  compulsory search
 to find out;  to discover;  to detect
 request for a police search;  application to the police to search for a missing person
 forensic researcher;  crime scene investigator
 special investigation department
 criminal investigation department;  CID;  criminal investigation section
 scientific crime detection;  forensic investigation
 right to investigate;  investigatory power
 to track down;  to locate;  to find out;  to smoke out;  to ferret out;  to chase up
 sting operation;  undercover investigation
 initial investigation (by police)
 sting operation;  undercover investigation
 investigating authorities;  law enforcement authority
 criminal investigation squad (team)
 house search (e.g. by the police)
 open criminal investigation
 special investigation headquarter
 search for corroborative evidence
 to search about for;  to hunt around for;  to look high and low for;  to look everywhere for
 (police) legwork;  house-to-house inquiry;  canvassing;  investigation carried out by questioning neighbours, bystanders, etc.
 chief investigator;  head of the investigation;  lead investigator
 to give up searching (for someone or something)
 police investigation carried out in the immediate vicinity of a crime site
 finding fault (with);  being picky
 treasure hunting;  treasure hunt;  lucky dip;  game involving finding hidden prizes from a sand box, barrel of leaves, etc.
 search conducted with the consent of the party concerned
 to search for;  to seek for;  to look for
 controlled delivery;  arm's-length surveillance
 finding fault (with);  being picky
 to give up searching (for someone or something)
 (police) legwork;  house-to-house inquiry;  canvassing;  investigation carried out by questioning neighbours, bystanders, etc.
 Deep Submergence Systems Project;  DSSP
 Special Rescue Exceedraft