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An experience report regarding the performance of the IBIS correlator
Ruprecht Nennstiel1, Joachim Rahm
1Forensic Science Institute, Bundeskriminalamt, Thaerstr.11, D 65193 Wiesbaden, Germany. ruprecht.nennstiel@bka.bund.de
Journal of Forensic Sciences
|January 21, 2006
Summary
This study evaluates the IBIS correlator
Area of Science:
- Forensic Science
- Ballistics
- Criminalistics
Background:
- Existing IBIS system evaluations focus on ballistic database creation.
- Limited research exists on IBIS performance in realistic open case file database (OCFDB) searches.
Purpose of the Study:
- To evaluate the performance of the IBIS correlator in a realistic OCFDB environment.
- To determine success and error rates for IBIS searches using diverse ammunition evidence data.
Main Methods:
- Performance evaluation of the IBIS correlator.
- Utilized four distinct data sources from the German Federal Criminal Police Office (BKA) ammunition evidence collection.
- Analysis of success and error rates in simulated OCFDB searches.
Main Results:
- Achieved 75-95% success rates for cartridge case comparisons.
- Achieved 50-75% success rates for bullet comparisons.
- Identified practical success and error rates for IBIS in realistic forensic casework.
Conclusions:
- The IBIS correlator demonstrates practical effectiveness in OCFDB searches.
- Recommendations are provided for optimizing IBIS system operation based on empirical results.
- Understanding prior definitions is crucial for interpreting findings.
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