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2,4,6‐Tri(2′‐pyridyl)‐1,3,5‐triazine for determination of iron(II), Iron(III), and total...
When iron‐based tools, such as knives or guns, are held, traces of iron can transfer to the skin. However, no previous studies have been published regarding the effect of the elapsed contact time on the transfer of iron species with different valences to the palm. Compared with 3...
Environmental assessment of gunshot residue particles in the public domain of the United...
Only limited data currently exists on the inadvertent transfer of gunshot residue (GSR), or GSR‐like particles through contact with public places. In this study, an assessment occurrence of GSR in public environments in England, UK was undertaken. Utilizing a stubbing sampling te...
Can latent fingerprint disclose the sex of the donor? A preliminary test study using GC–MS...
While fingerprints are a highly used means of identification, not every fingerprint left behind on a potential crime scene can be used for identification purposes. In some cases, the fingerprint may be smudged, partially preserved or overlapping with other prints hence distorting...
Shedder status—An analysis over time and assessment of various contributing factors
The shedder status of a person is an important consideration when evaluating probabilities of DNA transfer during activity‐level assessments. As an extension of our previously published study, the shedder statuses of 38 individuals were reassessed 1 year later. The study found th...
Overview of the seized and examined pharmaceutical in the state of Minas Gerais‐Brazil by...
This work presents a data survey regarding the qualitative chemical analysis of drugs seized by the Police in the state of Minas Gerais between July 2017 and June 2022, including an evaluation of labeling of 265 samples of anabolic androgenic steroids (AAS) seized in 2020. The Ac...
Palynology and mycology as biological evidence in a homicide case
Criminal cases are studied from several disciplines to link a suspect with a criminal act. In this case, a man was reported missing in a coastal area in Buenos Aires Province, Argentina. The victim's relatives pointed to a possible suspect, and the local police carried out t...
Using FastID to analyze complex SNP mixtures from indoor dust
Forensically relevant single nucleotide polymorphisms (SNPs) can provide valuable supplemental information to short tandem repeats (STRs) for investigative leads, and genotyping can now be streamlined using massively parallel sequencing (MPS). Dust is an attractive evidence sourc...
An innovative transfer DNA experimental design and qPCR assay: Protocol and pilot study
Forensic "touch" DNA samples are low‐quantity samples that are recovered from surfaces that have been touched by single or multiple individuals. These samples can include DNA from primary contributors who directly touched the surface, as well as secondary contributors w...
Reporting likelihood ratio for casework in firearm evidence identification
Likelihood ratio (LR) plays an important role in estimating the weight of evidence in firearm evidence identifications. LR is computed from a statistical model including the distribution of the known‐matching (KM or within) and known‐nonmatching (KNM or between) comparison scores...
Effects of 3,4‐methylenedioxymethamphetamine and methamphetamine on motor vehicle driving...
Methamphetamine (METH) and 3,4‐methylenedioxymethamphetamine (MDMA) are common drugs of abuse and driving under their influence may occur in 1 million people yearly in the United States. This systematic review fills the currently unmet need in understanding the effects of METH an...
Infrared spectra of North American automobile original finishes. XIV: Identification of...
The naphthol reds are a family of intermediate performance monoazo organic pigments and three of its members, C.I. Pigment Red 148, C.I. Pigment Red 170 (Naphthol Red), and C.I. Pigment Red 188, have been cited as having original automotive paint applications. This study sought t...
Psilocin – The “real deal” or an extraction byproduct
Most illicit drug casework samples at the Israel Police National Drug Laboratory are found to be mixtures of substances. Some are a mixture of an illicit drug with fillers, and others may contain more than one illicit drug. This study was triggered by a routine gas chromatography...
Effects of crime scene contaminants on surface‐enhanced Raman analysis of hair
Forensic analysis of hair is important as hair is one of the most commonly examined forms of trace evidence found at crime scenes. A growing body of evidence suggests that surface‐enhanced Raman spectroscopy (SERS), a label‐free and non‐destructive analytical technique, can be us...
Heroin and fentanyl in Dallas County: A 5‐year retrospective review of toxicological,...
The opioid epidemic resulted in an increase in identifications of fentanyl, fentanyl analogs, and heroin, among other opioids, in the toxicology and seized drug analysis fields over the past several years. The Dallas County Southwestern Institute of Forensic Sciences, comprised o...
Detection and discrimination of sedative‐hypnotics in spiked beverage dry residues using...
Drugs‐facilitated crimes (DFCs) involve the incapacitation of victims under the influence of drugs. Conventionally, a drug administration act is often determined through the examination of biological samples; however, dry residues from any surface, such as drinking glass if relat...
Trends of clandestine laboratories manufacturing methamphetamine in New Zealand between...
The most common method of domestic methamphetamine manufacture encountered in New Zealand is the hydrogen iodide (HI) reduction of pseudoephedrine/ephedrine. While the overall method used to manufacture methamphetamine has remained consistent, the processes and chemicals utilized...
Y‐STR mixture deconvolution by single‐cell analysis
Since Y‐STR typing only amplifies male Y chromosomal DNA, it can simplify the interpretation of some DNA mixtures that contain female DNA. However, if there are multiple male contributors, mixed Y‐STR DNA profiles will often be obtained. Y‐STR mixture analysis cases are particula...
Accuracy of comparison decisions by forensic firearms examiners
This black box study assessed the performance of forensic firearms examiners in the United States. It involved three different types of firearms and 173 volunteers who performed a total of 8640 comparisons of both bullets and cartridge cases. The overall false‐positive error rate...
Age prediction by methylation analysis of small amounts of DNA using locked nucleic acids
Age prediction based on methylation analysis has been reported in many populations, with 10 ng or more of DNA usually required for each determination. In this study, we designed thermostable locked nucleic acid (LNA) primers by replacing a small number of DNA bases in standard DN...
Examination of the possibility to use Siamese networks for the comparison of firing pin...
One of the most discussed issues in forensic firearms identification is the subjectivity of conclusions. The main part of firearms examiners' work is to make a microscopic comparison of the marks on cartridge cases and bullets. In this process, examiners have to decide if th...