Effectiveness and Best Practices in the Methods of Collection and Preservation of Hair Fiber Samples at the Crime Scene
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This research was conducted under the analysis of the effectiveness and best practices in the methods of collection and preservation of hair fibers at the crime scene, with the aim of optimizing the integrity of forensic evidence. To achieve this, a qualitative study was carried out based on the analysis of scientific literature, forensic manuals, applicable regulations, and technical reports to generate a comparative approach to the methods used in forensic cases requiring the collection of hair fibers as an integral part of the process. The intervention emphasized the evaluation of different collection methods, with the most commonly used being tweezers, adhesive tape, and forensic vacuums. Additionally, preservation techniques were analyzed, including storage in paper envelopes, test tubes, and the regulation of environmental conditions. The results of the study revealed that the choice of collection method directly depends on the type of surface and the amount of hair fiber present, while proper storage is crucial to prevent chemical degradation or cross-contamination that could affect the investigation. Therefore, it is essential to standardize procedures alongside the training of forensic personnel involved in this stage, as these factors are fundamental to ensuring the reliability of the evidence, which would strengthen the chain of custody and the validity of evidence in judicial processes.
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