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Impact Spatter Bloodstain Patterns on Textiles.

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  • 1Textile Engineering, Chemistry and Science, College of Textiles, North Carolina State University, 1020 Main Campus Drive, Raleigh, NC, 27695-8301, USA.

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Summary
This summary is machine-generated.

This study examined blood impact spatter on textiles. Larger yarn sizes on fabrics resulted in fewer and smaller stains, with distorted shapes due to fiber directionality.

Keywords:
bloodstain pattern analysisforensic scienceimpact spatterporcine bloodrattraptextiles

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Area of Science:

  • Forensic Science
  • Textile Science
  • Bloodstain Pattern Analysis

Background:

  • Bloodstain patterns on textiles are common at violent crime scenes.
  • Limited research exists on impact spatter characteristics on fabric surfaces.
  • Understanding spatter behavior on textiles is crucial for forensic investigations.

Purpose of the Study:

  • To investigate the deposition of impact spatter on knit fabrics.
  • To compare bloodstain characteristics on fabrics with varying yarn sizes to paper.
  • To analyze the influence of fabric structure on bloodstain formation and distribution.

Main Methods:

  • Impact spatter was created at a 90° angle onto three knit fabrics with different yarn sizes and onto paper.
  • Stain area and number of stains were quantified using ImageJ software.
  • Statistical comparison was performed using one-factor ANOVA.

Main Results:

  • The number and area of impact spatter stains decreased as yarn size increased on the knit fabrics.
  • Blood exhibited directional wicking along fiber direction on fabrics, causing distorted stain shapes.
  • Fabrics with larger yarns produced fewer stains than paper; smaller yarns yielded comparable stain counts to paper.

Conclusions:

  • Fabric yarn size significantly affects impact spatter deposition and stain characteristics.
  • The anisotropic wicking behavior of blood in textiles influences stain morphology.
  • Findings provide valuable data for interpreting bloodstain patterns on fabric evidence in forensic casework.