Forensic Science and Technology (ISSN:1008-3650)

With the continuous progress of science and technology, the production of electronic printed documents has become very convenient. Using a series of applications software in electronic equipment such as computers to edit, and then directly printing through printers can realize the production of contract text. However, in the practice of forensic science, cases of criminals forging electronic documents and committing crimes happen from time to time, so it is particularly important to examine and identify electronic printed documents. In the process of making electronic printing documents, ha

Metal evidence has been used in the field of forensic science for a long time, where it is commonly categorized as trace evidence and subject to rigorous testing. This type of evidence is frequently encountered in a diverse range of cases, including murder, theft, shootings and electrical fires. It can manifest as metal particles, attachments, or even in a molten state. The methods commonly employed in the analysis of metal evidence include scanning electron microscopy- energy dispersive X-ray spectrometry, metallography examination, X-ray fluorescence spectrometry, inductively coupled plas

In this paper, the specific structures of two first-phase metabolites of 2-fluoro-deschloroketamine except nor-2-fluoro-deschloroketamine were determined, and a detection method of 2-fluoro-deschloroketamine, nor-2-fluoro- deschloroketamine, cis-Dihydro-2-fluoro-deschloroketamine and trans-Dihydro-2-fluoro-deschloroketamine in urine was estabished using HPLC-QQQ MS/MS. Through HPLC-HRMS screening, two metabolites of 2-fluoro-deschloroketamine, namely cis-Dihydro-2- fluoro-deschloroketamine and trans-Dihydro-2-fluoro-deschloroketamine were determined and then were synthesized specifically. T

In this paper, we summarized a “gentle” differential lysis method by sharing the experimental process and successful experiences of a sexual assault cold case. This method can provide a new solution for handling old mixed stains. The biological sample is the long underwear worn by the victim at the time of the crime. Firstly, we got a positive PSA result of the mixed stains, and then we obtained great mixed DNA profiles with males and females using the one-step lysis method. When we tried the traditional differential lysis method to get a complete single male DNA profile, the re

Blood is a common physical trace evidence at crime scenes. In a fire scene, bloodstains and blood fingerprints are often two of the most important means of identifying a person and establishing the identity of a suspect. However, the fire scene, due to its exposure, destructiveness, and the invisibility of the causal relationship between the traces, poses difficulties and challenges for the recovery of relevant physical evidence and the investigation of the fire. Although fire destroys various traces of physical evidence left at the scene to a greater extent, bloodstains and blood fingerpri