Bob Milne has completed nearly 40 years of service with the Metropolitan Police Forensic Services Directorate, New Scotland Yard, as a forensic practitioner in the roles of ACPO registered fingerprint expert, crime scene examiner, and manager. He has written articles and made presentations on electrostatic mark lifting, the mathematics of scene linking, the crime mapping of forensic evidence, forensic intelligence in arson investigation, the design of self-contained sequential treatment fingerprint laboratories, and on the subject of forensics in intelligence-led policing. Bob is the inventor of the Pathfinder three-electrode wireless electrostatic dust mark lifter system used by CSIs worldwide. Since retiring from the Met Police in 2008, he has worked in the role of technical consultant with Crime Scene Investigation Equipment Ltd, developing and improving crime scene examination equipment and forensics software applications. In 2011, he became an associate fire investigator with Fire Investigations (UK) LLP and Fire Investigations Global LLP, a role that is ongoing.