"Red Ink as a Blood Analog in Pattern Analysis: A Review of Physical and Fluid Dynamic Properties"

Shaik Baji Sharif; Ejjurothu Sathwika

doi:10.36948/ijfmr.2025.v07i06.60145

"Red Ink as a Blood Analog in Pattern Analysis: A Review of Physical and Fluid Dynamic Properties"

Author(s)	Ms. Shaik Baji Sharif, Ms. Ejjurothu Sathwika
Country	India
Abstract	Bloodstain Pattern Analysis (BPA) is a crucial method in forensic science, vital for piecing together violent crime scenes and elucidating the order of events by interpreting bloodstain evidence. Through a systematic examination of the size, shape, distribution, and placement of bloodstains, professionals can gather important insights about the weapon involved, the total number of strikes administered, as well as the locations and movements of both victims and offenders. And even the time frame of the crime. BPA encompasses several distinct pattern categories, such as passive stains, transfer stains, projected stains, and expired patterns, each providing unique insights into the actions and interactions that occurred during the incident. Accurately interpreting bloodstains requires a strong foundation in physics, mathematics, biology, and fluid dynamics, as the behavior of blood spatter is influenced by principles like gravity, surface tension, impact angles, air resistance, and the properties of surfaces. Analytical methods range from traditional techniques, such as the string and tangent methods for determining the area and angle of origin, to modern empirical and digital tools that incorporate fluid dynamics and account for uncertainties involved in trajectory reconstruction. These scientific approaches enable the calculation of critical parameters, including impact angles, points of convergence, and travel distances, which provide objective and reproducible data to inform the investigation. BPA serves several investigative purposes: clarifying the timeline of the crime, corroborating or challenging witness testimonies, identifying or eliminating suspects, establishing the mode of death (e.g., homicide vs. suicide), and linking biological evidence to specific individuals or actions. Comprehensive documentation of the scene, including photographs, sketches, and the integration of scale and reference markers, ensures that all relevant features are accurately recorded for further analysis and presentation in court.
Keywords	blood spatter,sat4ellites,angle,impact,Stringing,Satellite Spatter,Directionality
Field	Biology
Published In	Volume 7, Issue 6, November-December 2025
Published On	2025-11-09
DOI	https://doi.org/10.36948/ijfmr.2025.v07i06.60145

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"Red Ink as a Blood Analog in Pattern Analysis: A Review of Physical and Fluid Dynamic Properties"

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