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