criminal investigation

noun
UK /ˌkrɪmɪnl ɪnˌvestɪˈɡeɪʃn/
US /ˌkrɪmɪnl ɪnˌvestɪˈɡeɪʃn/

The work police do to find out who broke the law and how.

The detective began a criminal investigation after the bank was robbed.


OTHER MEANINGS

2. The process of gathering facts about a crime to solve it.

The criminal investigation took six months to complete.

3. A formal examination of a suspected illegal act by authorities.

Officials launched a criminal investigation into the missing money.

4. The study of clues and evidence to identify a lawbreaker.

Her job in criminal investigation involves collecting fingerprints.