

The police started an investigation into the crime.
A careful search or study to find out facts or information.
The scientist conducted an investigation into the new drug.
The teacher launched an investigation after the incident in class.
The journalist's investigation revealed important information.
criminal investigation
thorough investigation
ongoing investigation
inquiry
probe
examination
The investigation took several months to complete.
The act of looking into something to find out information.
The police launched an investigation into the crime.
Her investigation revealed new evidence.
The investigation focused on the missing funds.
criminal investigation
thorough investigation
conduct an investigation
inquiry
probe
examination