Colossus is a one-to-many facial recognition search engine for any identity management application that involves very large numbers of images. It incorporates unique algorithms for unprecedented speed and accuracy at multi-million scale. Compatible with a wide range of image sources, Colossus is flexible, efficient and lighting fast for critical security situations. It recognises images from a wide range of visual sources including those from cameras, CCTV, E-Fit and mobile phone or portable devices. An operator captures an image of a suspect as they move past a camera. The image is then uploaded easily into Colossus and an identity search is run at unprecedented speed and with exceptional accuracy for reliable results.