Although there have been significant advances in fingerprinting techniques, studies on how these techniques affect other criminal evidence are limited. Synthetic cannabinoids (SC), which are illegal substances frequently encountered in crime scenes and are widely used worldwide, are available in various forms in the market (pill, powder, liquid, and herbal product). These synthetic cannabinoid substances have recently been introduced to places such as prisons and rehabilitation centers, primarily via an infused piece of paper. The first seizure of the paper-impregnated form of AB-PINACA and AB-FUBINACA in Turkey was observed in 2014. This study investigates the effects of fingerprint development methods on the concentrations of these SCs impregnated on paper. Therefore, eccrine and sebaceous fingerprints of volunteers were imprinted on the papers before and after they were impregnated with AB-PINACA and AB-FUBINACA. Six different fingerprint development methods were applied. Fingerprint development methods were later checked in 384 fingerprints.AB-PINACA and AB-FUBINACA infused on papers were extracted by the liquid−extraction method, and concentrations were analyzed via LC-MS/MS. After applying Thermanin, 1,2-indandione, iodine vapor, DFO, and 5-MTN fingerprint development methods, the
Calibration is an expectation for quality management systems as well as a need for laboratories. If there is a need to measure the size in the laboratory, there is also a need to determine whether the measuring instrument used there is measuring with the desired accuracy.In our study, the suitability of the digital thermometer, which is one of the devices used in the forensic science laboratory during the examination of the evidence, was examined within the scope of ISO / IEC 17025: 2017 standard.The temperature of the environment is very important during the analysis of the evidence.Therefore, it is important to determine the measurement uncertainty and confidence interval in the thermometer that measures this temperature.For this reason, in our study, the calibration procedures were carried out by selecting the digital thermometer device and using the calibration method compared to the reference.Uncertainty budgets were prepared by calculating the measurement uncertainty parameters one by one. Conformity assessment was made according to the measurement results.
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