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IAI CERTIFICATION EXAM 2025 IAI CERTIFICATION EXAM 2025 WITH GUARANTEED ACCURATE ANSWERS What sequence of latent print development techniques are used to develop prints from porous materials? - ACCURATE ANSWERS✔✔ DFO, Ninhydrin, Physical Developer. The final purple coloured compound usually produced with the treatment of Ninhydrin - ACCURATE ANSWERS✔✔ Ruhemann's Purple. What latent print development technique is used to process nonporous material that are wet? - ACCURATE ANSWERS✔✔ Small Particle Reagant. A dye which stains protein present in blood to give a blue-black product
- ACCURATE ANSWERS✔✔ Amino Black.
The following types of fingerprints will fluoresce under appropriate illumination - ACCURATE ANSWERS✔✔ Natural latent fingerprints and fingerprints contaminated from the environment. One of the first processes used in a sequence of a fingerprint examination - ACCURATE ANSWERS✔✔ Fluorescence Examination. Gentian Violet is a dye which stains fatty constituents of sebaceous sweat producing an intense purple image. It is effective for the development of what kind of prints? - ACCURATE ANSWERS✔✔ Adhesive surface of adhesive tapes. Alternative process name for Amido Black - ACCURATE ANSWERS✔✔ Naphthalene Black. Iodine vapour is physically absorbed by latent fingerprint deposits and often fades unless fixed. What color image is formed using iodine vapour? - ACCURATE ANSWERS✔✔ Brown. What can interfere with the forensic examination for handwriting, body fluids, and ink? - ACCURATE ANSWERS✔✔ Gentian Violet. Ninhydrin is a general purpose fingerprint reagent for paper and some other porous surfaces. What component of a fingerprint deposit does it react with? - ACCURATE ANSWERS✔✔ Amino acids.
Which latent print development technique was replaced by the Ninhydrin/Physical Developer combination for treating porous materials
- ACCURATE ANSWERS✔✔ Silver Nitrate. Silver Nitrate reacts with what component present in fingerprint deposits
- ACCURATE ANSWERS✔✔ Chlorides. Small particle reagent (SPR) is a latent print development technique that may be used on all non-porous surfaces including those which are - ACCURATE ANSWERS✔✔ wet. What does Small Particle Reagent adhere to in the fingerprint deposit? - ACCURATE ANSWERS✔✔ Fats. Small Particle Reagent is comprised of what fine particles? - ACCURATE ANSWERS✔✔ Molybdenum Disulphide. Small Particle Reagent forms what color deposit? - ACCURATE ANSWERS✔✔ Grey The best latent print development technique for use on non-porous surfaces which are contaminated with grease, foodstuffs, or dried deposits of soft drinks - ACCURATE ANSWERS✔✔ Sudan Black An alternative process name for superglue is - ACCURATE ANSWERS✔✔ Cyanoacrylate
Superglue polymerizes on some latent fingerprints to produce what colored deposit - ACCURATE ANSWERS✔✔ White Superglue is thought to react primarily with what component in that latent print deposit - ACCURATE ANSWERS✔✔ water Superglue is most suitable for what kinds of surfaces? - ACCURATE ANSWERS✔✔ non-porous Vacuum Metal Deposition utilizes vacuum-coating technology for the evaporation of metals and the deposition of this metal films. The layers of what metal is used for this process? - ACCURATE ANSWERS✔✔ Gold and zinc Vacuum Metal Deposition is particularly suitable on what surfaces? - ACCURATE ANSWERS✔✔ Polythene plastic This fingerprint development technique reacts more intensely with older fingerprints thereby making It possible to determine the relative age of a latent print - ACCURATE ANSWERS✔✔ Rodamine 6G Employed in the Central Police Department, La Plata, Argentina and installed the French Bertillon Anthropometric Identification System - ACCURATE ANSWERS✔✔ Vucetich
The use of magnetic fingerprint was first reported by: - ACCURATE ANSWERS✔✔ H. Macdonald What is applied with the fuming gun method, fuming cabinet method, and solution method? - ACCURATE ANSWERS✔✔ Iodine In 1982 the US Army Criminal Investigation Laboratory in Japan introduced which novel procedure for processing evidence for latent prints? - ACCURATE ANSWERS✔✔ Superglue What kind of prints are developed using an accelerate of a portable heater, hair dryer, or alcohol lamp? - ACCURATE ANSWERS✔✔ Superglue prints Reacts with the amino acids in the fingerprint deposit - ACCURATE ANSWERS✔✔ Ninhydrin Freon 113 is a solvent that has been used to produce: - ACCURATE ANSWERS✔✔ Ninhydrin An alternative name for "1,8-diazafluoren-9-one" is: - ACCURATE ANSWERS✔✔ DFO Who reported the use of DFO for the fluorescent detection of latent prints on paper? - ACCURATE ANSWERS✔✔ Pounds
A photographic process that is based on the formation of silver and a ferrous/ferric redox couple and the deposition of metal salts onto a fingerprint image: - ACCURATE ANSWERS✔✔ Physical Developer These reagents have been reported to work very successfully in the enhancement of bloody fingerprints - ACCURATE ANSWERS✔✔ Amido black and coomassie blue These light sources have been utilized in the development of latent prints and have produced better latent print images than regular room light - ACCURATE ANSWERS✔✔ UV light sources, lasers and xenon arc lamps The "Luma-lite" and "Polilight" are - ACCURATE ANSWERS✔✔ alternative light sources The use of this solvent in the preparation of Ninhydrin prevents ink from running on paper documents - ACCURATE ANSWERS✔✔ Freon 113 This is known as the latent print examiner's "chemical workhorse" for the treatment of porous materials for latent prints - ACCURATE ANSWERS✔✔ Ninhydrin This process can lead to a significant increase in the quality and contrast of ridge detail revealed when used in conjunction with Ninhydrin - ACCURATE ANSWERS✔✔ Heat and humidity
The core of a loop is placed upon or within the _____ - ACCURATE ANSWERS✔✔ innermost sufficient recurve The essentials of this is: a sufficient recurve, a delta, and a ridge count across a looping ridge - ACCURATE ANSWERS✔✔ loop Loops that flow in the direction of the ulna bone are called - ACCURATE ANSWERS✔✔ ulnar loops Loops that flow in the direction of the radius bone are called - ACCURATE ANSWERS✔✔ radial loops Consists of two separate loop formations, with two separate and distinct shoulders and two deltas - ACCURATE ANSWERS✔✔ double loop A tenprint card with a primary classification of 32/32 means that all of the prints are - ACCURATE ANSWERS✔✔ whorls The classification formula may be composed of the following divisions:
- ACCURATE ANSWERS✔✔ primary, secondary, subsecondary, major, final , key NCIC stands for - ACCURATE ANSWERS✔✔ National Crime Information Center
Based on NCIC classification an actual ridge count + "50" represents what kind of fingerprint pattern? - ACCURATE ANSWERS✔✔ radial loop The NCIC code for tented arch is: - ACCURATE ANSWERS✔✔ TT The NCIC code for missing/amputated fingers is: - ACCURATE ANSWERS✔✔ XX When fingerprinting the dead and rigor mortis has set in and the fingers are tightly clenched, you can do this to the fingers - ACCURATE ANSWERS✔✔ forcibly straighten by "breaking the rigor" This person is credited with being the first European to recognize the value of friction ridge prints and to actually use them for identification purposes - ACCURATE ANSWERS✔✔ Sir William Herschel The first truly scientific method of criminal identification was devised by: - ACCURATE ANSWERS✔✔ Alphonse Bertillion Anthropometry is an identification system also known as: - ACCURATE ANSWERS✔✔ Bertillonage This person significantly helped advance the field of fingerprint identification in South America while employed at the Central Police
The solids of eccrine sweat are half inorganic salts and half organic compounds, The salt is mostly sodium chloride while the organic compounds include: - ACCURATE ANSWERS✔✔ urea, amino acids, peptides Incipient ridges are also called ______ ridges - ACCURATE ANSWERS✔✔ rudimentary, subsidiary, nascent A feature where friction ridges all tend to lean in the same direction - ACCURATE ANSWERS✔✔ Imbrication The epidermis is the ____ layer of the skin - ACCURATE ANSWERS✔✔ outer The inner layer of cells in the epidermis (AKA stratum mucosum) - ACCURATE ANSWERS✔✔ stratum malpighii The outer layer of cells in the epidermis - ACCURATE ANSWERS✔✔ stratum corneum The deepest layer of cells next to the dermis - ACCURATE ANSWERS✔✔ basal layer The inner layer of friction ridge skin - ACCURATE ANSWERS✔✔ dermis
The surface of the dermis is covered with blunt peg-like formations - ACCURATE ANSWERS✔✔ dermal papillae Injury or disease that penetrates the skin to the dermal papillae level can damage the epidermal _____ layer infrastructure - ACCURATE ANSWERS✔✔ basal The first noticeable development of friction skin on the volar surfaces takes place at about # weeks of gestation - ACCURATE ANSWERS✔✔ 12 A triradius is called a ____ in most classification systems - ACCURATE ANSWERS✔✔ delta The study of the effects of disease and genetic aberrations on the friction ridges is referred to as - ACCURATE ANSWERS✔✔ dermatoglyphics The comparison of relative pore locations is called - ACCURATE ANSWERS✔✔ poroscopy There are instances when ridge units are present but do not fuse together to form friction ridges. This aberration may affect all of the volar surfaces or just a small part. This condition is known as: - ACCURATE ANSWERS✔✔ dysplasia
Dirty substrates may not accept all of the matrix available during deposition. The resulting prints can: - ACCURATE ANSWERS✔✔ appear blotchy, lack detail, and have areas missing Soft substrates permit the friction ridges to sink into their surfaces and ____. - ACCURATE ANSWERS✔✔ create molded impressions Prints deposited when the friction ridges are wet, usually with water or a fluid other than sweat, are commonly referred to as wet prints. The friction ridges tend to appear as a series of ______ before and after development. - ACCURATE ANSWERS✔✔ rounded units This development media can pile up in the nooks and crannies such as pore openings and fine crevices in the matrix - ACCURATE ANSWERS✔✔ fingerprints powders Deposition pressure generally changes the shape of the friction ridge by:
- ACCURATE ANSWERS✔✔ flattening or broadening each ridge Pressure distortion is different from deposition distortion. While deposition pressure describes vertical weight being places on the friction ridges, pressure distortion take place where? - ACCURATE ANSWERS✔✔ on the lateral or horizontal plane Deposition or pressure distortion indicators that are warnings or warrant careful analysis - ACCURATE ANSWERS✔✔ red flags
A dip in the ridge at a pore opening, a failure in deposition of matrix, or dirt may cause: - ACCURATE ANSWERS✔✔ ridge break The intrinsic or innate ridge formations are what level of detail - ACCURATE ANSWERS✔✔ 3rd level detail When encountering friction ridge clusters, the anatomical aspects of the digits in the cluster assist with: - ACCURATE ANSWERS✔✔ digit determination Friction ridge comparison is a process where visual comparative measurements, and sometimes physical comparative measurements are made between the latent and exemplar prints. The measurements are sequential, spatial, and configurative in nature. The comparison must be completely: - ACCURATE ANSWERS✔✔ objective During the identification process the purpose of the first level detail is: - ACCURATE ANSWERS✔✔ to narrow the number of possible donors Hale's islands and branchings refer to major 2nd level ridge path deviations found on the friction ridge known as: - ACCURATE ANSWERS✔✔ islands and bifurcations When two bifurcations form on the same ridge facing each other and their branches join, the formation is called: - ACCURATE ANSWERS✔✔ enclosure
Any chart presented must be technically correct. That includes the corresponding ridge characteristics in the two prints must be similarly numbered and indicated. How may points are ample enough to illustrate an identification? - ACCURATE ANSWERS✔✔ 12 A chart will present a clearer, neater, and more pleasing appearance if it is numbered, how? - ACCURATE ANSWERS✔✔ clockwise and the numbers evenly spaced The use of edge shapes during comparison and does not require the shape to be classified. One shape is compared to another and found to be consistent or not - ACCURATE ANSWERS✔✔ edgeoscopy Was originally coined by Salil K. Chatterjee in a paper published in "Fingerprint and Identification Magazine; September 1962 - ACCURATE ANSWERS✔✔ edgeoscopy The scientific knowledge supporting ridgeology has been extracted from various related sciences such as: - ACCURATE ANSWERS✔✔ genetics, anatomy, embryology Ridgeology was coined in 1983 by - ACCURATE ANSWERS✔✔ David Ashbaugh Friction ridges begin to form on the human fetus during which months of fetal life? - ACCURATE ANSWERS✔✔ 3rd and 4th
When the skin is damaged to the extent that both the epidermis and dermis are disturbed; provide additional and valuable means of identification. - ACCURATE ANSWERS✔✔ scar About 60% of fingerprint patterns - ACCURATE ANSWERS✔✔ loops About 35% of fingerprint patterns - ACCURATE ANSWERS✔✔ whorls About 5% of fingerprints patterns - ACCURATE ANSWERS✔✔ arches John Dillinger, the notorious criminal of the Great Depression, tried to remove his fingerprints with: - ACCURATE ANSWERS✔✔ acid There are 10 spaces on a fingerprint card, and if a whorl appears in either the right thumb or index finger space, the space is given a value of: - ACCURATE ANSWERS✔✔ 16 There are 10 spaces on a fingerprint card, and is a whorl appears in either the left ring or little fingers space, the space is given a value of: - ACCURATE ANSWERS✔✔ 1 The large cushion area at the base of the thumb is known as: - ACCURATE ANSWERS✔✔ thenar
