![]() ![]() ![]() The electrostatic technique is another method used for footprint analysis in the case of dusty footprints where these dust particles are lifted onto a black vinyl sheet which is placed over the print to be developed when a high voltage is passed through an aluminum foil that covers the vinyl sheet.ĭigtrace software is the first integrated software used to capture 3D images of footwear impressions at the crime scene using a digital camera and also to compare footwear traces digitally. Holography is a laser technique used to record footprints present on carpets where a hologram (laser beam) is used for photography. Nowadays fingerprint credit cards are used by people to carry out payments where implementation of fingerprint recognition ability of the user is carried out on a plastic card similar to a standard credit card. Fingerprint sensors are utilized by fingerprint recognition systems in order to identify and extract the required features for identification purposes through a fingerprint scan using optical sensors. After processing the required input data, the output is set up where the fingerprint is matched or no-match. Fingerprint processors process the input data received from the sub-systems on the basis of pre-loaded information stored in their memory. Micro-X Ray Fluorescence Technology detects the sweat residues found in fingerprints such as sodium, potassium, chlorine, and other elements and thus facilities the visibility of fingerprints based on their location.įingerprint processors and sensors are some of the new advancements in this field. This technology is used in personal devices and in buildings residing in restricted areas or in buildings that should have special entry permissions/privileges as a means of security purposes. Magnetic fingerprinting is a recent development of fingerprint technology that provides a clear and non-contaminated fingerprint impression and carries out effective identification with the help of certain online databases in order to derive reliable source information of the print. This method can be further advanced by adding fluorophore molecules to the film that helps to develop a high-contrast fingerprint image. When an electric current is applied to the print, a deposit of colored electro-active film is observed in the bare regions between the fingerprint deposits which are the electrochromic image of the print. This method is based on the electrical insulating properties of chemical components of fingerprints that block the electric current. This technique utilizes an innovative chemical fuming process to enhance fingerprints on the above-mentioned surfaces.ĭeveloping fingerprints on metallic objects or on surfaces where the prints have been wiped or washed off with soap water can be carried out by creating a negative image of the print known as an electrochromic image. Recover Latent Fingerprint Technology (LFT) is a novel technique used to reveal fingerprints on surfaces exposed to a very high temperature such as discharged ammunitions (cartridge cases or bullets), burned vehicles or corroded materials, and on surfaces that have been deliberately washed off. Recent researchers have shown that the race of an individual can be determined with the help of minutiae present in the prints. However, this concept is still under study. This method is based on the movement of biochemical molecules residing in fingerprints from the ridge area to the empty furrow regions of fingerprints. Scientists are able to distinguish the age of a print that is between a day/ week old, a week/month old, and a month/four months old. It is also possible to identify whether the particular drug was ingested or it was simply touched by the suspect where the traces remained on his fingers based on the drug metabolites.įingerprint Molecular Identification (FMI) Technology utilizes mass spectrometry in order to identify gender biomarkers as well as narcotics and nicotine metabolites along with some legal medications for criminal convictions. Recent studies have shown that using mass spectrometric devices or portable mass spectrometers at crime scenes, it is possible to detect the residues of illegal drugs such as cocaine. Some of the recent advancements pertaining to this evidence are as follows:Ī fingerprint is a vital tool for identifying the use of illicit drugs by a criminal. With improving and developing technologies in the field of impression evidence, different methods have been adopted to identify and develop them. Some of the impression evidence commonly encountered at the scene of the crime are fingerprints, footprints, lip prints, ear prints, bite marks, tool marks, etc. Impression evidence is those evidence created when an object is pressed against another material with sufficient force.
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