noun - a person who secretly gives the police information about criminals or crimes
noun - a small camera worn on a police officer's uniform to record what happens while they are on duty
adjective - connected with scientific methods used by the police to solve crimes, such as studying fingerprints or DNA
verb - to secretly tell someone important information, usually to warn them or help the police
noun - the act of making sure that laws and rules are obeyed
noun - the police and other people whose job is to make sure that laws are followed and to protect the public
noun - a special police tool placed on the road to stop a car by making its tires lose air
adjective - having a speckled appearance of light and dark colours mixed together
adjective - having a mixture of dark and white or grey hairs
noun - an unpleasant, harsh, or metallic ringing sound made by metal objects hitting each other