26 Works

Test strips for examining reactivity of fingerprints visualization methods on absorptive surfaces with amino acids

Tomasz Szczepański, Urszula Więckiewicz & Krzysztof Klemczak
This article provides the results of research on the uniformity of amino acid test strips used with fluorescent DFO method. Ready to use amino acid test strips made of the absorptive material containing four reactive fields of exponentially decreasing amino acid concentrations, designed for DFO, ninhydrin, 1,2-indanedione methods were used in the study. The test strips were treated with DFO solution in order to measure the fluorescence emission level of DFO-amino acid reaction product for...

Selected issues related to illegal cannabis cultivation

Anna Trynda & Anna Duszyńska
For a long time, cannabis-based products have been enjoying unwavering popularity. Not surprisingly, the number of illegal cannabis plantations discovered in Poland and worldwide is increasing year on year. The plantation sizes vary from single plants grown “for own needs” in pots or outside housing, or farm facilities to professional, fully automated cultivations maintained by criminal groups. The article provides a summary of data analysis concerning illicit cannabis plantations liquidated in Poland since 2012. Additionally,...

Examination of post-reaction residues of pyrotechnic material – p. 1: Smoke generators

Łukasz Matyjasek, Wiktor Dmitruk & Łukasz Cichosz
The work contains a review of literature data referring to the methods of generating pyrotechnic smokes with inclusion of chemical composition of widely used smoke generating substances and, in particular, specifications of dyes used in pyrotechnic products. Construction of such devices, the manner of initiating ignition and possibilities of identification of residues resulting from their use were explained basing on 79 examined smoke generators. Analyses of smoke generating mixtures were executed with use of classical...

Development of a technologically advanced IT system enabling automated processing of information collected in forensic biometric databases in order to combat crime or identify people

Edyta Kot
Forensic biometric databases are an out of court tool to support the work of law enforcement agencies. They are used to detect the perpetrators of crimes, indicate the connections of a person with previously committed crimes, and allow the identification of living persons and corpses with unknown identity or individuals trying to hide their identity. In police practice, among the methods of identification of living persons and corpses, fingerprint and DNA tests are mainly used....

Firearms – three in one

Henryk Juszczyk
The article presents guns that depending on assembly can be regarded as different types of weapons. The ZORAKI mod. 906 and mod. 914-S pistols include sets of plugs, which, depending on the configuration of their installation, make the above-mentioned pistols play the role of alarm, gas or combat firearms.

Cases of automatic firing with semiautomatic pistols

Henryk Juszczyk & Michał Borusiński
The article presents cases of endangering shooters and bystanders caused by wear of firearms parts or their incorrect assembling. The Authors analysed examples of disorders in P-83 and P-64 pistols. In P-83 pistol firing as if in an automatic mode became possible because of incorrect mounting of the firing pin in the slide while in P-64 pistol it resulted from wear of the firing pin and the safety block.

Problems encountered in the dactyloscopic investigation of anonymous corpses with fingerprint patterns preserved in silicone molds and the attempt to solve them

Paweł Malinowski
The article describes experiments conducted using the Automatic Fingerprint Identification System (AFIS), which demonstrated that replacing the standard search type TP/TP (card/card) with the type LT/TP (trace/ card) in conducting dactyloscopic investigations with fingerprint patterns preserved in silicone molds leads to optimal results. Moreover, a series of practical tips for investigators are included, covering the AFIS tools that should be used to obtain correct search results in the system and minimize the risk of errors.

Fingerprinting and improvement of the readability of the fingerprints of corpses

Artur Wójcik, Ewa Rogoża, Katarzyna Drzewiecka & Marcin Wudarczyk
Fingerprinting of corpses is always problematic even for experienced forensic experts and technicians. This publication is a compendium of the knowledge about physical and chemical methods in dactyloscopy and improving the readability of the friction ridges of corpses. It mentions the possibility of a very broad use of not only dactyloscopic paints, but also fingerprinting powders, films, as well as silicone casts, latex matrices etc. The publication also highlights the necessity of photographic documentation of...

Methods and markers used for human age estimation in forensics

Anna Woźniak
The article presents the previous and current methods and markers used for estimation of human age. The analysis of biological material recovered from the scene of the event makes it possible to estimate the age of a person who deposited traces. The new methods allow determining the depositor’s age, based on biological traces commonly found at the scene, such as blood, saliva or sperm, with an accuracy of a few years. The previously used age...

Damage to WALTHER P99 cal. 9 mm pistol during shooting

Henryk Juszczyk
The aim of this article is to warn against the possible injury hazard for the shooter, resulting from the wear of the components of weapon during dry firing. The analyzed case presents the damages to a gun caused by multiple dry firing, i.e. without a cartridge in the chamber. As a consequence of the shots, the breech face of the pistol was damaged. Therefore, it should be considered to categorically ban dry firing with WALTHER...

Contrasting fingerprints with Basic Yellow 40 – a methological algorithm

Katarzyna Drzewiecka & Ewa Rogoża
Basic Yellow 40 is a fluorescent dye used to contrast fingerprints revealed by the cyanoacrylate-based method. It is available as a yellow, crystalline, fluorescent powder. For visualization studies, Basic Yellow 40 is used as a solution, which is obtained by dissolving the powdered substance in alcohol or water. The solution is applied onto the surface by pouring, spraying, immersing or brushing. Excess of the solution can be rinsed off the surface with water or, in...

Sebaceous and sweat secretions and age person’s age

Ewa Rogoża & Katarzyna Drzewiecka
The article presents results of the relationship between the quantity of sweat and sebaceous secretions and the age of a person. The study was carried out in a group of 70 persons of various ages and both sexes. Basing on the results it may be concluded that the age and sex have a significant influence on the quantity of sweat and sebaceous secretions. This can be used during preparation of various test samples, for example...

Effect of selected fabrics on the appearance of bloodstains

Emilia Szabłowska-Gnap, Joanna Dąbrowska & Kamil Januszkiewicz
on their surfaces. This applies particularly to absorbent surfaces, whose properties may have extreme influence on bloodstains. Experiments have shown that the modifications are the result of the type, texture and weave of the fabric. It has been proven that laundered or wet fabrics may change their properties, thus affecting bloodstain shape and size. Bearing in mind how many factors can influence the appearance of bloodstains, it is crucial for the BPA experts to properly...

Damage caused by projectiles shot from ZORAKI R1 model K-10 6 mm/10 mm calibre pistols

Maciej Kuliczkowski & Henryk Juszczyk

Reverse engineering technology for forensic use

Tomasz Kurzynowski, Grzegorz Ziółkowski, Karol Kobiela, Edward Chlebus & Henryk Juszczyk

Nile Red – contrasting colour cyanoacrylate

Ewa Rogoża & Katarzyna Drzewiecka

Developing fingermarks on porous surfaces with the use of genipin in the gaseous phase

Tomasz Szczepański, Sławomir Zubański, Antoni Siejca, Urszula Więckiewicz, Krzysztof Klemczak & Patryk Brzeziński
The article presents the results of studies on the method of sensibilizing dactyloscopic traces directly from the gaseous phase. The detection of dactyloscopic traces on absorbtive surfaces requires specific revealing methods, whose essential aspect is the need to deliver reagent to the place of occurrence of the corresponding component of trace forming substance. In practice, for many years, various types of solutions have been used for this purpose, such as DFO, ninhydrin and 1,2-indanedione. Within...

Passive magnetic methods – introduction to forensic research

Krzysztof Borkowski, Krzysztof Ćwik & Krzysztof Biskup

Specific cases of bullet ricocheting off a ballistic wall

Grzegorz Bogiel & Paweł Dudek
The phenomenon of bullet reflection from a ballistic wall has not yet been described or investigated in forensic practice. The article presents the method of conducting such tests, including the results thereof. The tests were carried out using a high-speed camera, video analysis software and a Doppler radar. As a result of the study, the velocities of bullets for which the phenomenon of reflection from the ballistic wall is observed, were determined.

Acquisition of data encrypted in electronic components of vehicles and machinery for pre-court proceedings

Krzysztof Biskup, Krzysztof Ćwik & Tadeusz Neumann
The article presents results obtained during research on acquisition of data encrypted in electronic components of vehicles to be used in pre-court proceedings, as well as identifies the possibilities of their use in further practice by forensic toolmaker examiners and police officers dealing with combating vehicle related crime.

Legality of owning WALTHER P22 and P99 9 mm cal. 9 mm gas pistols on the territory of Poland

Henryk Juszczyk
The article describes the problem of selling WALTHER P22 and P99 cal. 9 mm P.A. gas pistols to people not possessing appropriate permission. People who purchase such weapons, without permission to possess them, expose themselves to the charge of illegal possession of firearms. The article presents arguments why these types of weapons are treated as firearms the possession of which requires permission.

Identification of a synthetic cannabinoid 5F-NPB-22 (indazole analog 5F-PB-22) by gas chromatography/mass spectrometry (GC/MS) method

Robert Bachliński & Agnieszka Mroczek
This article presents the problem of transesterification of a synthetic cannabinoid 5F-NPB-22 and other structurally related indazole and indole-based compounds, such as NPB-22, 5F-PB-22, BB-22 and PB-22, caused by methanol – a solvent commonly applied in gas chromatography/mass spectrometry (GC/MS) analysis. The above process can result in drawing incorrect conclusions about the composition of analyzed product, due to the formation of ester compounds, which mainly affects the reliability of results. In the present study, in...

Improving the readability of fingerprints of corpses using Ardrox and stamp ink

Artur Wójcik, Ewa Rogoża, Katarzyna Drzewiecka & Marcin Wudarczyk
Fingerprinting of corpses is more difficult than fingerprinting of living people. The level of difficulty of fingerprinting the fingertips depends on the condition of the corpse. Despite a variety of known methods of skin elastification and improvement of readability of fingerprints, better and more effective methods providing higher level of identification corpses are being sought. This publication presents the course and results of the analysis involving the potential use of Ardrox and stamp ink to...

Registration Year

  • 2020

Resource Types

  • Data Paper


  • Centralne Laboratorium Kryminalistyczne Policji
  • Wrocław University of Science and Technology
  • Warsaw University of Technology
  • Police Academy in Szczytno
  • TOMSAD Tomasz Sadowski (Poland)