ANPR — Automatic Number Plate Recognition. Roadside or mobile cameras that automatically capture the registration number of all cars that pass. It can be used to historically track which cars went past a certain camera, and can also create a signal for cars which are stolen, have no insurance or have an alert attached to them.
CID — Criminal Investigation Department. Usually refers to the divisional detectives rather than the specialist squads.
CPS — Crown Prosecution Service.
CSI — Crime Scene Investigators. Formerly SOCO (Scenes of Crime Officers). They are the people who attend crime scenes to search for fingerprints, DNA samples etc.
DIGITAL FORENSICS — The unit which examines and investigates computers and other digital devices.
FLO — Family Liaison Officer.
MO — Modus Operandi (method of operation). The manner by which the offender has committed the offence. Often this can reveal unique features which allow crimes to be linked or suspects to be identified.
RaSP — Royalty and Specialist Protection (officer/team).
SIO — Senior Investigating Officer. Usually a Detective Chief Inspector who is in overall charge of the investigation of a major crime such as murder, kidnap or rape.
Police ranks are consistent across all disciplines and the addition of prefixes such as ‘detective’ (e.g. detective constable) does not affect seniority relative to others of the same rank (e.g. police constable).