0 in the UK, a police detective of senior rank, above an inspector and below a superintendent; also used as a title:
He has been rewarded for his efforts with a promotion to the rank of detective chief inspector.
Campbell is the detective chief inspector in charge of the inquiry.
Tell the DCI I'm on my way.
Detective Chief Inspector Dave Thomas told the Echo: "We are very anxious to speak to anyone who saw Karen last night."
At the police station in Clifford Street he asked for DCI Southwell.
