Reference ballistic imaging database performance

Kinder, Jan De; Tulleners, Frederic A.; Thiebaut, Hugues

doi:10.1016/j.forsciint.2003.12.002

Cited by 29 publications

(44 citation statements)

References 3 publications

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“…We also estimate the parameter values from , which uses only breech face and firing pin information (i.e., no ejector mark information), has a database of 600 casings, and considers 32 arrivals that have a mate with the same ammunition type (Remmington) in the database. The probability that an arrival's mate ranks in position k is

P (k) = \frac{599!}{(k - 1)! (600 - k)!} \int_{0}^{\infty} (1 - G (t {))}^{k - 1} G (t)^{N - k} f (t) d t

From Fig.…”

Section: Methodsmentioning

confidence: 99%

Using Spatial, Temporal and Evidence‐status Data to Improve Ballistic Imaging Performance

Yang

Koffman

Hocherman

et al. 2013

Journal of Forensic Sciences

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Firearms identification imaging systems help solve crimes by comparing newly acquired images of cartridge casings or bullets to a database of images obtained from past crime scenes. We formulate an optimization problem that bases its matching decisions not only on the similarity between pairs of images, but also on the time and spatial location of each new acquisition and each database entry. The objective is to maximize the detection probability subject to a constraint on the false positive rate. We use data on all cartridge casings matches detected in Israel during 2006-2008 to estimate most of the model parameters. We estimate matching accuracy from two different studies and predict that the optimal use of extraneous information would increase the detection probability from 0.931 to 0.987 and from 0.707 to 0.844, respectively. These improvements are achieved by favoring pairs of images that are closer together in space and time.

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P (k) = \frac{599!}{(k - 1)! (600 - k)!} \int_{0}^{\infty} (1 - G (t {))}^{k - 1} G (t)^{N - k} f (t) d t

From Fig.…”

Section: Methodsmentioning

confidence: 99%

Using Spatial, Temporal and Evidence‐status Data to Improve Ballistic Imaging Performance

Yang

Koffman

Hocherman

et al. 2013

Journal of Forensic Sciences

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“…It follows the forensic science basic principle of individuality that no two tools marks should produce the same microscopic marks on two separate objects that they would be inaccurately or wrongly identified (Smith et al, 2016). Fired cartridge cases and bullets bear characteristic marks, which enable firearm examiners to identify the firearm that fired them (Kinder et al, 2004). Examination of firing pin and breech face impression on the fired cartridge case is essential link for the linkage of firearm with the fired cartridges (Sharma, 1963).…”

Section: Introductionmentioning

confidence: 99%

Development of firing pin and breech face impression on lead and plasticine surfaces- a case report

Sehgal

Sahota

Kaur

et al. 2017

Egypt J Forensic Sci

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Background: The microscopic examination of fired cartridge cases and fired bullets helps the expert to determine if a suspect firearm/firearms were, or were not, discharged in a shooting incident. This is achieved by using a combination of class and individual characteristics. But in case of malfunctioning of firearm, experts have to adopt different methods to link fired cartridge cases and fired bullets with the suspected firearm. Case presentation: In this paper, a new method for the reproduction of the firing pin and breech face impression on two different surfaces are reported. Two chosen surfaces are plasticine and lead metal. Conclusions: The surface of the lead being soft and brittle reproduced the impression with maximum detail. Five match points were seen on the lead surface with clear demarcation whereas only three points of individual characteristics marks were observed on plasticine surface.

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“…Finally, we would like to point out that recent studies on large databases of marks left by firearms have also amplified the need to extend our knowledge in this field [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Experimental evaluation of the impact of seating depth variations on observed marks on primers

Smet

Hermsen

Leuven

et al. 2008

Forensic Science International

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Reference ballistic imaging database performance

Cited by 29 publications

References 3 publications

Using Spatial, Temporal and Evidence‐status Data to Improve Ballistic Imaging Performance

Using Spatial, Temporal and Evidence‐status Data to Improve Ballistic Imaging Performance

Development of firing pin and breech face impression on lead and plasticine surfaces- a case report

Experimental evaluation of the impact of seating depth variations on observed marks on primers

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