Introduction: Through the centuries; researchers, scientists and engineers have brought great innovations to the world. These innovations are not limited to any single area, but rather have been shared across all. From advanced weapons and guidance systems to the remote that controls your TV, progress has been made. One of the most notable advances concerns the field of criminology. Two new technologies that have had quite a significant impact are infrared spectroscopy and chromatography. A body was found with no identification found on the body. An external examination of the body revealed numerous needle marks, bruises and thrombosed veins in the cubital fossae. The head showed evidence of blunt force trauma and small fragments of paint and metal were removed from the wound. Analysis of the stomach contents revealed a few partially digested potato chips and partially digested pills. A small amount of residue was extracted from the tin for analysis. Footprints were evident on the carpet where soil had been found. Soil samples were collected from these footprints. This analysis will show how infrared spectroscopy and chromatography would be useful in finding both the cause of the murder and possibly the identity of the culprit. Infrared spectroscopy: Infrared spectroscopy was first used in the 1950s by Wilbur Kaye. He designed a machine that tested the near-infrared spectrum and was able to provide the theory to describe the results. There have been many advances in the field of IR specification, the most applicable being the application of Fourier transforms. “The Fourier transform is a tool that decomposes a waveform (a function or signal) into an alternative representation, characterized by a sine and... middle of paper... the mass spectrometer. This is called an electronic impact source. Gases and volatile liquid samples can escape into the ion source from a reservoir. Non-volatile solids and liquids can be introduced directly. The cations formed by the electron bombardment (red dots) are repelled by a charged repulsive plate (the anions are attracted to it) and accelerated towards other electrodes, having slits through which the ions pass like a beam. Some of these ions break up into smaller cations and neutral fragments. A perpendicular magnetic field deflects the ion beam in an arc whose radius is inversely proportional to the mass of each ion. Lighter ions are deflected more than heavier ions. By varying the intensity of the magnetic field, ions of different masses can be gradually focused onto a detector attached to the end of a curved tube. Because the mass of each individual ion