Preposition: of

• phenomenon: He is known as an advocate of international peace and an investigator of psychical phenomena.

Converse of object

• tell: The first sister told the investigator that on 28 October she arrived on duty at 3.00pm.

• accredit: Accredited Fraud Investigators Scheme There is something not quite right about one who professes an expertise in fraud investigations.

• employ: Investigators employed by the company had found samples of its GM oilseed rape among Schmeiser's stock.

• assist: CRAs are responsible for selecting investigators and may assist investigators to obtain approval from ethics committees.

• determine: Investigators determined that all the affected motors were connected to the same standby motor control center which was equipped with new digital motor protectors.

Adjective modifier

• principal: James Campbell is principal investigator for the vaccine trials at the University of Maryland School of Medicine.

• paranormal: Recently paranormal investigators have been able to obtain perhaps one of the most useful new tools to support their investigations.

• undercover: At the end of the experiment the undercover investigator filmed an autopsy being performed on a monkey which was still alive.

• Lead: This is undertaken by nine full time funded pre and post doctoral researchers, supported by consultant grade scientists and a Lead Investigator.

• co-principal: I am also co-principal investigator on an ESRC-funded ethnographic study of evidence-based policy-making in international maternal health.

• forensic: Arrangements may be made for a forensic investigator or a police officer to visit you.

Modifies a noun

• site: There may be more than one principal investigator site in a program.

Noun used with modifier

• principal: You would also be a key member of the team of Principal Investigators who lead the science across BAS.

• fraud: For example, we must give information to authorized benefit fraud investigators where fraudulent benefit claims are suspected.

• collision: The police input will involve a number of police motorcyclists and a collision investigator who is also a keen motorcyclist.

• accident: The number of trained accident investigators should be increased.

• crash: Crash investigators are trying to establish the cause of the accident.

• crime: Crime scene investigators have left their marks all over the place.