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The collaborative study on typing group-specific component in casework bloodstains
1Central Research and Support Establishment, Home Office Forensic Science Service, United Kingdom.
Journal - Forensic Science Society
|January 1, 1990
Summary
Forensic casework bloodstains were successfully typed for group-specific component (GC) in multiple labs. This blood typing method is effective for aged stains and various substrates in forensic science.
Area of Science:
- Forensic Science
- Biochemistry
- Genetics
Background:
- Bloodstain typing is crucial for forensic investigations.
- Existing blood grouping systems have limitations in casework.
- Group-specific component (GC) typing offers potential advantages.
Purpose of the Study:
- To evaluate the effectiveness of group-specific component (GC) typing in operational forensic casework.
- To determine the success rate and reliability of GC typing on aged bloodstains and diverse substrates.
Main Methods:
- Eight forensic laboratories participated in the study.
- Approximately 600 casework bloodstains were analyzed.
- Various substrates including clothing, metal, concrete, and glass were tested.
Main Results:
- A mean success rate of 62.7% was achieved for GC typing.
- Successful typing of bloodstains older than three months was reported by six laboratories.
- No specific substrate consistently caused issues with GC typing.
Conclusions:
- The group-specific component (GC) system is a viable and effective test for operational forensic science.
- GC typing demonstrates reliability on aged stains and a range of substrates.
- This method enhances the capabilities of forensic blood analysis.