noun
ADJECTIVE
▪ careful , close , detailed
▪ extensive
▪
The authorities conducted an extensive ~ into his tax affairs.
▪ full , in-depth , thorough
▪ preliminary
▪
After conducting preliminary ~s, government lawyers will set out areas of concern.
▪ ongoing
▪
The ongoing ~ has led to numerous intelligence leads.
▪ criminal , homicide ( AmE ), murder , police
▪ congressional , federal , government
▪ internal
▪
The board of directors commissioned its own internal ~.
▪ independent
▪ empirical , scientific
VERB + INVESTIGATION
▪ carry out , conduct , pursue , undertake
▪
Police are still pursuing their ~s.
▪ initiate , launch , order
▪ call for , demand
▪
He called for ~ into the hospital's management.
▪ head , lead , oversee
▪ complete
▪ deserve , merit , require , warrant
▪
These claims certainly warrant further ~.
▪ impede , obstruct
▪
He was on trial for allegedly obstructing an ~ into the bank's dealings.
INVESTIGATION + VERB
▪ demonstrate sth , reveal sth , show sth , uncover sth
▪
Closer ~ showed a flaw in this theory.
▪ conclude , show , suggest
▪
An official ~ concluded that 9 000 people were killed or went missing during that period.
PREPOSITION
▪ on ~
▪
On ~, the noise turned out to be only a door banging.
▪ under ~
▪
The singer is currently under ~ for possessing illegal drugs.
▪ ~ into
▪
Police have launched an ~ into the allegations.
PHRASES
▪ the subject of an ~
▪
The matter is the subject of a police ~, and we cannot comment.