Scene of Crime Officer

Scene of Crime Officers (SOCOs), increasingly titled Crime Scene Investigators (CSIs) in many forces, are police staff forensic practitioners who attend crime scenes to systematically examine, recover, and package forensic evidence. The work spans a wide range of scene types: volume crime (burglaries, vehicle crime, theft), serious acquisitive crime and robbery, sexual offences, assaults, suspicious deaths, and major incidents. At each scene, the SOCO assesses the forensic potential, establishes the best sequence of examination to avoid cross-contamination, and applies a range of evidence recovery techniques — fingerprint powdering and lifting, biological sample recovery using sterile swabs (for DNA profiling), photography and video documentation, footwear mark recovery (using electrostatic lifting or casting), and trace evidence collection (glass, paint, fibres, tool marks).

For serious crime scenes — murders, rapes, or major incidents — SOCOs are part of a forensic management structure that may include a Senior Investigating Officer (SIO), a crime scene manager, a forensic pathologist, and specialist forensic scientists. The SOCO's role is to recover exhibits in a forensically sound manner, maintaining exhibit continuity, completing exhibit labels and continuity forms, and briefing the SIO on forensic findings from the scene. For volume crime, SOCOs typically work alone or in pairs, managing a caseload of scene visits scheduled through the crime management unit.

The College of Policing Level 3 Certificate in Crime Scene Investigation is the qualification standard, completed through an employer-funded programme delivered over approximately 12 months in post. Some forces have moved to a Level 4 Foundation Degree route for new entrants. SOCOs do not require a pre-entry forensic degree, though some forces favour science graduates in competitive recruitment processes.

Physical crime scene investigation is a statutory requirement of the criminal justice system: forensic evidence recovered by qualified SOCOs underpins the prosecution of thousands of volume and serious crime cases every year in England and Wales. The requirement for exhibit continuity, the complexity of contamination management, and the need for professional accountability in court proceedings mean that crime scene recovery cannot be replaced by automated systems or remote tools. DNA and fingerprint evidence recovered by trained SOCOs remains foundational to cold case reviews, rape prosecutions, and serious crime investigations.

Every police force in England and Wales employs SOCOs or CSIs, creating nationally distributed employment. Forensic science quality standards — reinforced by the Forensic Science Regulator Act 2021 — are increasing competence requirements for practitioners, restricting entry to qualified individuals and creating strong job security for those who achieve the Level 3 or Level 4 qualification. The ongoing expansion of major crime forensic capability and the increasing use of forensic evidence in volume crime prosecution are sustaining demand across all force types.

Briefing at 08:00: you are allocated a queue of six volume crime scenes from overnight — four domestic burglaries, one shed break, and one vehicle crime. You attend the first burglary: a terrace house where entry was through a rear kitchen window. You photograph the point of entry, examine the windowsill for fingerprints and shoe marks, recover a blood spot from the glass fragments using a swab, and dust the door handle. You find a partial fingerprint on the outside of the frame and recover it by tape lift. Back at your vehicle you complete the exhibit log and label all items. By afternoon you have attended four of the six scenes. You complete the crime scene examination reports for each job on the mobile device system before the end of shift.