Evidently quicker

Forensic scientists could analyse large quantities of evidence far more quickly and accurately using a technique, currently under development in the UK, to enhance the sensitivity of sample imaging.

ATR (Attenuated Total Reflection) infrared imaging could allow crime investigators to analyse large surface areas of human skin, clothes, banknotes and explosives, according to project leader Dr Sergei Kazarian of the chemical engineering and chemical technology department at Imperial College. Forensic scientists could even detect particles resting in the ridges of a human fingerprint.

The technique involves focusing infrared radiation onto the end of an element. This element is then pressed against the material being analysed. When the infrared radiation reflects through the element, it penetrates the material and generates a unique image of its surface by revealing spectral differences between elements.

The project is being part-funded by the Forensic Science Service and, said Kazarian, the use of infrared spectroscopy could herald a breakthrough in the way forensic scientists are able to analyse data.