Morphological details in bloodstain particles

Area of Science:

• Forensic Science
• Materials Science

Background:

• Bloodstain particles are sub-millimeter flakes lost from dried bloodstains.
• These particles can be crucial forensic evidence found at crime scenes.
• Spectroscopic methods can confirm the nature of these particles.

Purpose of the Study:

• To investigate the shedding of bloodstain particles from various fabric substrates.
• To understand how substrate type influences the characteristics of shed blood particles.
• To determine the forensic significance of bloodstain particle morphology.

Main Methods:

• Experimental deposition of bloodstains on different fabric types (polyester, polyamide, absorbent, knitted).
• Observation and analysis of shed bloodstain particles using microscopy.
• Spectroscopic confirmation of particle composition.

Main Results:

• The largest bloodstain particles were shed from blood deposited on polyester and polyamide woven fabrics.
• No particles were lost from bloodstains on absorbent fabrics.
• Bloodstains on knitted fabrics did not shed particles.
• Morphological features of shed particles varied based on the substrate.

Conclusions:

• The type of fabric substrate significantly impacts the shedding of bloodstain particles.
• Analysis of bloodstain particle morphology can provide valuable information about the origin substrate.
• This finding has implications for forensic investigations involving bloodstain evidence.