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I/61TBuIhdauL._SY445_.jpg' alt='Zip Dry Paper Glue Msds' title='Zip Dry Paper Glue Msds' />Sebastian Police Department, Florida Level One  Ridge Flow Class Characteristics is the largest scale of information, such as the general type of the central area of the fingerprint, such as an arch, whorl, or loop. Other level one details may include such matters as the overall ridge count, focal areas of the print, such as delta regions roughly triangular shaped areas where ridges flowing in different directions meet, and the orientation of the print. Showing that level one details are identical is not enough to make an identification of the finger that is the source of a latent print. Level Two   Ridge Characteristics or Points  detail focuses on the characteristics of ridge paths, such as places where ridges bifurcate or end or create dots or islands. These features provide a great deal of detail. Each feature can be identified in terms of the type of feature end, bifurcation, etc., its direction, and its location with respect to other identifiable features in the print. Level two detail can be used to identify one individual finger from among the entire human population as the source of the latent print. Level Three       Ridge Structure   detail can be described as ridge detail, with such tiny features as pores on a ridge and the width and shape of the ridge itself and its edges. These level three details are the most vulnerable to problems with the quality of the latent print. They are so small that a clear, high quality image is needed to make accurate comparisons. When the latent print is sufficiently clear, level three detail can contribute to the identification of the source of a latent print. The Justice Department, FBI uses and has adopted a standard method afingerprint examiner goes through. It is a four step process with the acronym ACE V, for analysis, comparison, evaluation, and verification, and focusing on Level one, Level two and Level three details The first phase is analysis. Ecg Software Download For Pc. Analysis is a thorough examination of the unknown. In the case of fingerprints, the latent print would be examined to determine the ridge formations that exist at three levels of detail. Level one detail refers to the first appearance of the print noticed at the beginning of an examination. Generally, Level one refers to the overall pattern or ridge flow tendencies of the print. Level two detail refers to the next features observed, generally those with a physical dimension on the order of magnitude of a ridge width. The so called Minutiae or points, are level two detail. Level three detail refers to smaller features generally observed under magnification. Level three features are normally contained within a single ridge, such as shapes and positions of sweat pores poroscopy or distinctive shapes on the edge of a ridge edgeoscopy. Incipient ridge shapes are also usually considered level three details, but the presence of incipient ridges in general would be a level one consideration. A large scar might be considered as level one detail, whereas a small scar might only be observed at level two. Within a scar there may be valuable level three detail. A thorough analysis of the unknown consists of far more than simply looking at the minutiae points. Another part of the analysis of a latent print is the assessment of all of the various causes of distortion and their effect upon the print. Distortion could result from a number of sources, including the matrix, or residue, which comprises the print the substrate, or surface, on which the print was left the direction of touch the pressure of the touch reaction of the matrix with the development medium and so on. All of these factors should be assessed during the analysis of the latent print. Analysis also takes into consideration the clarity of the print. Clarity differences result from distortion. A latent print lacking level three detail as a result of pressure distortion, for example, might be described as having a low degree of clarity, whereas a print showing good pore and edge structure and having minimal distortion might be characterized as having a high degree of clarity. Inherent in the analysis of the latent print is the selection of a suitable target to be memorized and used when searching the inked prints. Such a target is usually an easily recognizable cluster of minutiae points. On the other hand, it might be a distinctive scar, a prominent crease or wrinkle pattern, or any other significant and easily recognizable formation that results from features in the area of friction skin that left the print. The target will be the starting point for the second and third phases of the identification process, therefore it should be both an easily recognizable feature in the unknown print and potentially the easiest to find in the known prints. A thorough analysis should be accompanied by the taking of detailed notes describing the latent print. Notes should make reference to all observed distortion factors. Notes may also include reference to the level of clarity present in the print. One might actually draw the target, both as an aid in its memorization and as a part of the description of the latent. On occasion, one may even choose to physically follow or trace the ridges completely throughout the print and draw a representation of the entire latent in the notes. This type of demonstrable analysis lends credence to any subsequent identification. Once a thorough analysis of the latent print has been completed, the second phase of theidentification process is comparison. Whereas, during analysis the examiner focuses exclusively on the unknown print, during the comparison phase the examiner concentrates primarily on the known, or inked, prints. The examiner searches each inked print in turn, observing all three levels of detail in a search for an image that is consistent with the detail found in the latent print during its analysis, and that has the target selected for the search. Once a known print is located that is consistent in appearance with the unknown and contains the target, the examiner enters the third phase of the identification process, evaluation. In this phase, the two prints are examined together, side by side. The examiner finds features first in the unknown print, then in the known print, then evaluates the corresponding features to determine if they are within tolerance for the level of clarity that exists in the images. In this manner, the examiner goes back and forth between the two prints, finding features first in the unknown, then evaluating their appearance in the known print. The reason for working from the unknown image to the known has its foundation in human psychology. When dealing with a less clear image, usually the latent or unknown print, the brain is subject to influence by mind set. If a feature is first observed in a clear image, the brain may form an expectation and be tricked into seeing the same feature in an unclear image even though it does not actually exist there. Take, for example, in the case of a faint ninhydrin print a chemical used in latent print development in which the ridges appear primarily as a series of light dots.