CID is the branch of all
British Police and many other Commonwealth police forces to which plain
clothes detectives belong. It is thus distinct from the Uniformed Branch
and the Special Branch. CID officers must have spent at least two years
as uniformed officers before applying to transfer to the branch and
receive further training when they do so.
CID officers are involved in investigation of major crimes such as rape,
murder, serious assault, fraud, and any other offences that require
complex detection. They are responsible for acting upon intelligence
received and then building a case, from analysis of the initial incident
through to arrest and prosecution of any suspects.