Bloodstain pattern analysis has a significant role in crime scene recreation. A variety of surfaces like wood, tiles, glass, soil, paper, etc., can be encountered at a crime scene. Bloodstains formed on paper are usually well preserved making them ideal for forensic analysis. Although different types of papers have similar composition, they vary in their textures depending on their purpose. The present work aims to find out how the stain patterns are affected by the fall height, the type of paper, and the properties of the fluid. Stains were created using alta dye, chicken blood, and goat blood on five different types of papers. The shape, diameter, and edge characteristics of the stains were recorded and analysed. Composition and surface texture of the paper samples were determined through Fourier Transform Infrared Spectroscopy (FTIR) analysis and stereomicroscopy, respectively. FTIR analysis suggested that all the paper samples had similar composition, whereas stereomicroscopy revealed the differences in their surface textures. Stain edge morphology varied from paper to paper with glossy paper showing patterns significantly different from other papers, owing to its smooth surface and greater density. The present study confirms that bloodstain patterns change with the textures of the target surfaces even if they have a similar composition. Thus, it is recommended to perform tests on the same surface on which bloodstains are observed, to improve the accuracy of bloodstain pattern analysis for crime scene recreation.

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A Comparative Study of Bloodstain Pattern Analysis on Different Types of Paper Surfaces

  • Mayur Sudhir Balbudhe,
  • Saroj Prasad Babar

摘要

Bloodstain pattern analysis has a significant role in crime scene recreation. A variety of surfaces like wood, tiles, glass, soil, paper, etc., can be encountered at a crime scene. Bloodstains formed on paper are usually well preserved making them ideal for forensic analysis. Although different types of papers have similar composition, they vary in their textures depending on their purpose. The present work aims to find out how the stain patterns are affected by the fall height, the type of paper, and the properties of the fluid. Stains were created using alta dye, chicken blood, and goat blood on five different types of papers. The shape, diameter, and edge characteristics of the stains were recorded and analysed. Composition and surface texture of the paper samples were determined through Fourier Transform Infrared Spectroscopy (FTIR) analysis and stereomicroscopy, respectively. FTIR analysis suggested that all the paper samples had similar composition, whereas stereomicroscopy revealed the differences in their surface textures. Stain edge morphology varied from paper to paper with glossy paper showing patterns significantly different from other papers, owing to its smooth surface and greater density. The present study confirms that bloodstain patterns change with the textures of the target surfaces even if they have a similar composition. Thus, it is recommended to perform tests on the same surface on which bloodstains are observed, to improve the accuracy of bloodstain pattern analysis for crime scene recreation.