[The new technique for the identification of aluminium on the study objects by the contact-diffusion method]

Area of Science:

• Forensic Science
• Analytical Chemistry
• Materials Science

Background:

• Trace evidence analysis is crucial in forensic investigations.
• Identifying specific firearm types aids in reconstructing crime scenes.
• Aluminium deposits can be indicative of gunshot residue.

Purpose of the Study:

• To explore the use of alizarin S as an indicator for detecting trace aluminium deposits.
• To establish a method for determining gunshot distance based on aluminium sedimentation.
• To identify specific traumatic weapons, such as 'Osa' and 'Strazhnik' types, through trace evidence.

Main Methods:

• Utilizing alizarin S as a chemical indicator for aluminium.
• Analyzing trace deposits on various objects.
• Correlating aluminium sedimentation patterns with gunshot distance.
• Comparing trace evidence with known ballistics from 'Osa' and 'Strazhnik' firearms.

Main Results:

• Alizarin S effectively indicates the presence of trace aluminium.
• The concentration and distribution of aluminium deposits correlate with shooting distance.
• Distinctive aluminium sedimentation patterns can be linked to specific firearm models.

Conclusions:

• Alizarin S is a viable tool for detecting trace aluminium in forensic ballistics.
• This method enhances the ability to determine gunshot parameters and identify weapon types.
• The findings support the use of chemical indicators in the forensic analysis of firearm-related evidence.