Static electricity reveal the effects of crimes

fingerprint

Experience of modern methods used in the science of fingerprinting stage taking fingerprints from the site of the crime is constantly evolving. But it is yet far from what is necessary, note that the simple ways lacks precision. The complex ways such as using chemical solution would need to be a long time as is the case with the use of atomic force microscope.

The magazine wrote "Forensic Sciance International" that the British science Professor Robert Prince and his colleagues from the University of Sussex acquired the British fingerprints can be compared with samples of traditional worked on the basis of analysis of static electricity charge left by the man by the touch of insulation electricity. The scientists can design a sender sensitive to measure the surface charge density in an area of ​​up to 5 microns and map where the lines intersect with the fingerprint surface. The process takes 75 minutes. Experiments showed that was held to mark one in two weeks, the speed of erosion of the shipment, which enables scientists to determine the age of the footprint, or rather exception, people have touched the materials to touch the offender after the commission of the crime from the list of suspected persons. But there are significant negative observed in the application of this method is the possibility of dealing with material that conducts electricity only, such as glass and plastic. The material that conducts electricity Krsasp example, do not lend themselves to this method.