1988). Forensic glass samples can be analyzed by comparing the refractive index of the sample to that of the possible source. These are less likely to alter the sample.

c. SUSPEND the glass in water. Unfortunately, the junior forensic investigator who obtained a “forensic image” of the computer only performed a logical acquisition.

McCrone, W. C., McCrone, L. B., and Delly, J. G. McQuillan, J. and Edgar, K. A. 1994; Corning, Incorporated 1998; Doyle 1994; Varshneya 1994).

1 Weird Trick To Easily Cure Vitiligo For Good In As Little As 7 Days - Guaranteed! . Wayne Bertram Williams Boyd, D. C., Danielson, P. S., and Thompson, D. A. 2002). 12. Ryland, S. G. Sheet or container?—Forensic glass comparisons with an emphasis on source classification.

Unpublished report. Consequently, use of FAAS has been supplanted largely by various inductively coupled plasma (ICP) methods because ICP can analyze multiple elements simultaneously. Wolnik, K. L., Gaston, C. M., and Fricke, F. L. Analysis of glass in product tampering investigations by inductively coupled plasma atomic emission spectrometry with a hydrofluoric acid resistant torch, Journal of Analytical Atomic Spectrometry (1989) 4:27–31. Motor Carrier Vehicle Safety Standards, Glazing Materials, 49 CFR 571.205.

A beam of monochromatic light is directed through the vapor, and the absorption is measured. During the production of modern glass manufactured using the float process, liquid glass is poured onto a bath of molten tin (Doyle 1994). Tie thread around glass. In: Forensic Science Handbook. The “Trace Evidence Unit: Casework Assignment and Review Procedures” section of the Trace Evidence Unit Quality Assurance Manual (2006) states: A glass association is defined as two or more glass samples that can be fracture fitted together, or that exhibit indistinguishable observable properties and/or range overlap in all measured properties. Available: http://www.astm.org/Standards/C162.htm. Expert reporting guideline. FSS Report No.

Parouchais, T., Warner, I. M., Palmer, L. T., and Kobus, H. The analysis of small glass fragments using inductively coupled plasma mass spectrometry, Journal of Forensic Sciences (1996) 41:351–360. Forensic Psychology Graduate Programs in Florida, Forensic Psychology Graduate Programs in Massachusetts, Forensic Psychology Graduate Programs in Texas, Forensic Psychology Graduate Programs in New York, Forensic Psychology Graduate Programs in California, Christian Colleges with Forensic Accounting Majors, Juvenile Forensic Psychology: Schools & Programs, Top College in Tucson for a Law Enforcement Degree, Study.com Scholarship Terms and Conditions, Become a Special Victims Unit Detective: Career Roadmap, Masters in Healthcare Management in California, Doctor of Education Instructional Leadership Degree Overview, Bachelors Degree in Speech Therapy Program Summary, Glass as Forensic Evidence: Purpose, Collection & Preservation, Physical Evidence & Crime Scene Reconstruction, Firearms, Tool Marks & Impression Evidence, NY Regents Exam - US History and Government: Tutoring Solution, DSST Human Cultural Geography: Study Guide & Test Prep, NY Regents Exam - Global History and Geography: Tutoring Solution, Praxis Sociology (5952): Practice & Study Guide, Praxis Core Academic Skills for Educators - Mathematics (5732): Study Guide & Practice, Praxis Core Academic Skills for Educators - Reading (5712, 5713): Study Guide & Practice, ILTS School Counselor (181): Test Practice and Study Guide, Praxis Mathematics - Content Knowledge (5161): Practice & Study Guide, ILTS Social Science - Sociology and Anthropology (249): Test Practice and Study Guide, Praxis Psychology (5391): Practice & Study Guide, NY Regents Exam - Global History and Geography: Test Prep & Practice, Middle Kingdom of Ancient Egypt: Definition & Timeline, Quiz & Worksheet - Physical & Cultural Boundaries, Quiz & Worksheet - Local Government's Cultural & Political Influences, Quiz & Worksheet - Central Place Theory & Market-Area Analysis, Quiz & Worksheet - Types of Shapes of States, Quiz & Worksheet - The State as a Concept, Praxis Biology & General Science: DNA and Replication, Praxis Biology & General Science: Genetics and Inheritance, Praxis Biology & General Science: Evolution.

Forensic Science Service, Birmingham, England, 1978. Law

Detail all information relating to possible use/ownership of the evidence identified and extracted. Over the next several years, the concentrations of additional elements in glass by inductively coupled plasma-optical emission spectrophotometry were determined, and 6 to 10 element classification schemes based on comparison with a glass database divided into nine product categories were developed (Hickman 1981; Hickman et al. If you wish to opt out, please close your SlideShare account. Allen, T. J. and Scranage, J. K. The transfer of glass—Part 1: Transfer of glass to individuals at different distances, Forensic Science International (1998) 93:167–174.

ASTM International. During experimental studies, glass fragments have been recovered from up to four meters away from a breaking glass object (Francis 1993; Locke and Unikowski 1991). Davies, M. M., Dudley, R. J., and Smalldon, K. An investigation of bulk and surface refractive indices for flat window glasses, patterned window glasses, and windscreen glasses, Forensic Science International (1980) 16:125–137.

B. F. Fluorescence spectrometry in the identification and discrimination of float and other surfaces on window glasses, Journal of Forensic Sciences (1981) 26:325–342. A., Satterthwaite, M. J., and Harrison, P. H. A survey of glass fragments recovered from clothing of persons suspected of involvement in crime, Science and Justice (1995) 35:273–281. McQuillan, J. and McCrossan, S. Unpublished report.

In contrast to crystalline solids, which have an ordered internal arrangement of atoms, the internal structure of glass consists of a network of atoms lacking long-range symmetry. All other trademarks and copyrights are the property of their respective owners. In further studies, the distributions of up to 22 elements, most measured by inductively coupled plasma-optical emission spectrophotometry, in various glasses were shown to provide excellent discrimination capability among sources within a product class (Hickman 1983; Hickman et al. George Allen & Unwin Ltd, London, England, 1972, pp. Scientific Working Group for Materials Analysis (SWGMAT).

Abramowitz, M. Contrast Methods in Microscopy: Transmitted Light.

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John Wiley & Sons, New York, 1994. For glass, relative dispersion, or dispersive power, is used to quantify dispersion (Koons et al. The variation in glass properties between types of glasses is pronounced (Boyd et al. More Info.. ★★★ http://tinyurl.com/y4p92al9, My struggles with my dissertation were long gone since the day I contacted Emily for my dissertation help.

The physical properties used for comparison include glass color, fluorescence, thickness, surface features, and curvature. This brightness contrast enhances the Becke line (Abramowitz 1987). Neutron activation analysis has the advantage of being a nondestructive and extremely sensitive form of chemical analysis.

Smalldon, K. W. and Brown, C. The discriminating power of density and refractive index for window glass.

Primary transfer also can occur when a person or object comes into contact with previously broken glass (Allen et al. Find Volume of glass.

In: Trace Evidence Unit Quality Assurance Manual.


ASTM C729-05 Standard Test Method for Density of Glass by the Sink-Float Comparator. Roux, C., Kirk, R., Benson, S., Van Haren, T., and Petterd, C. I. Koons, R. D., Buscaglia, J., Bottrell, M., and Miller, E. T. Forensic glass comparisons. I'm out in the driveway on my cell, and I'm afraid to go into the house!

The Hitler Diaries The fragments should be properly documented prior to their addition into the density gradient column so as to facilitate identification when they are recovered from the gradient. What it a third party?

Reeve, V., Mathiesen, J., and Fong, W. Elemental analysis by energy dispersive X-ray: A significant factor in the forensic analysis of glass.

Presented at the International Symposium on the Forensic Examination of Trace Evidence in Transition, San Antonio, Texas, June 24–28, 1996.

Hughes, J. C., Catterick, T., and Southeard, G. The quantitative analysis of glass by atomic absorption spectroscopy.

credit by exam that is accepted by over 1,500 colleges and universities. In glass, these are controlled by the composition of the batch (chemical composition) and the cooling history of the glass (atomic arrangement) (Varshneya 1994).

The closer something is to the breaking glass, the more likely it is to have glass fragments transferred to it (Allen and Scranage 1998). Koons and Buscaglia (1999) used the data from a chemical composition database and refractive index database to calculate the probability of a coincidental match.

Interpretation of glass composition measurements: The effects of match criteria on discrimination capability, Journal of Forensic Sciences (2002) 47:505–512. This fluorescence is caused by the uptake of tin on one side of the glass during manufacturing. In some laboratories, glass density is measured either in addition to or instead of measuring optical properties. A.

Dispersion staining is very similar to the Becke line method. 458.

1, 15th ed.

1980).